Well Gears of War is only better than Resistance for a number of reasons because it has a ton of factors that helped it out behind it.
Some factors:
1. Epic had almost more than two years to make Gears of War.
2. They got a jump on the engine to use for Gears of War.
3. It has awesome graphics which is basically why everyone loves it so much. However it did so much to sacrifice for those graphics like not even comparing to the amount of action Resistance has on screen and having 40 multi play or the amount of destruction and destructible environments.
Resistance is amazing because....
1. Its a launch game and is almost able to compare to a second gene game. I mean sure Gears of War might be better but when a game that is launch almost able to compare to it that says something.
2. Resistance has awesome graphics, in the amount of time they were able to pull them off is just amazing. Resistance took 10 months to develop where Gears had more than 24 months to make its game. In those 10 months they had to make the graphics engine specifically for the PS3 and they had to come up with concept and all that jazz. They also had to make servers for their impressive multiplayer.
3. Resistance is more original imo. I love Resistance's weapons because its just crazy how awesome and original they are. Sure they may remind you of a couple weapons from other games but it has some tweaks that make it its own weapon. Gears just kept ordinary guns and really didn't do anything special to them. It had a
Sniper rifle
Grenade Launcher
Assault Rifle
Locust gun that shot like the assault rifle
A pistol
Shotgun
I mean get more creative and have some awesome crazy ass weapons that make you think how to play. Resistance arsenal would have worked amazing with Gears of War and would have made it cooler.
Check out Resistances arsenal:
Auger: A Chimeran developed weapon that fires a bolt of energy. This energy bolt can burrow through solid objects, to impact those behind cover, thus negating cover. The bolts slow down as they move through objects, and a spark of light can be seen, warning potential victims that their cover has been breached. The alternate fire of the Auger is an energy shield that is impenetrable except to other Auger shots.
BullsEye: A relatively standard assault weapon developed by Chimera. The twist of the weapon is its alternate fire: the tag. By firing a tag, bullets now home in on the tag. This allows smart players to hit the enemy, and then hide in cover, bending their bullets around cover to still hit enemies. Firing the Bullseye into a wall or object, however, creates a potential 'Bullseye-Bomb'. Bullets will home into the target, and swarm about to form a sphere of bullets. You can then fire it at an enemy, and the swarm of bullets will track down the locked-on enemy. If bullets remain in the swarm when the enemy dies, the swarm will hover in the air, until the Bullseye is fired again.
L23 Far Eye: Another human weapon, the Far Eye is a sniper rifle. While aiming through the scope, the game simulates heightened reflexes by slowing down time while the player can aim normally. The Far Eye will be available for multiplayer, but the ability to slow down time will not be included.
XR-003 Sapper: The Sapper is a unique weapon which is said to be reverse-engineered from Chimeran technology, and produced by humans. It fires unstable sticky 'goo-balls', which explode when someone moves nearby. The balls can stick together, even creating chains that dangle from the roof. The alternate fire is used for manual detonation.
Hailstorm: The Hailstorm is Resistance's take on the minigun. Its rapid storm of fire can ricochet from walls, increasing its lethality in confined combat. Its alternate fire converts the remaining contents of the clip into a turret that auto-targets and fires at enemies.
LAARK: The LAARK rocket launcher is unique in that its primary fire releases a singular powerful rocket, but its secondary fire is able to spread its contents into a number of miniature rockets. The weapon can also be slowed down, and even stopped mid flight. And whilst paused, its trajectory can be modified, to fire around corners, or over barricades. This weapon has been confirmed for online play.
M5A2 Carbine: The M5A2 Carbine is the standard issue human machine gun with a 40 mm grenade launcher attachment.
Rossmore 236: The Rossmore 236 is the basic shotgun. It can be fired single barrel or double barrel.
Reaper: A weapon that is a new twist on an old standby: dual-wielding pistols. While most games have both pistols aimed in the same direction, the Reapers are capable of independent firing. Consider R1 the right hand and L1 the left hand. When you hold down both buttons, the reticule splits off into two individual reticules. Your hands sweep the area, and a modest auto-lock from each pistol will then latch onto whatever enemy crosses its path. This is great for taking on lots of small Chimera. This weapon is only acquired after beating the game once.
L11-2 Dragon: The L11-2 Dragon is a standard flamethrower. Its alternate fire has been labeled as a vapor cloud. No further information exists at the moment. This weapon is only acquired after beating the game once.
Arc Charger: The Arc Charger is a high-powered gun used by elite Chimeran soldiers. It shoots a bolt of lightning. The alternate fire allows said lightning to arc to nearby enemies. This weapon is only acquired after beating the game once.
Splitter: Similiar to Ratchet & Clank's RYNO, the Splitter shoots a salvo of rockets. Its secondary fire splits the rockets into a wall of smaller rockets. Both can fires be directed, much like the LAARK. This weapon is only acquired after beating the game once.
Grenade: An average grenade.
Hedgehog: The Hedgehog is a Chimeran take on a grenade. When deployed the Hedgehog will launch upwards and explode, hurling spikes in every direction.
Air Fuel Grenade: Much like the name implies, this grenade uses air fuel to burn enemies. This weapon is only acquired after beating the game once.
Dude thats such a tight set of weapons.
5. It has a pretty sweet story and its very original, its crazy to because there is so much that happens in it and such an awesome back story that Resistance had to come up with its just phenomenal.
6. Maybe the game play isn't revolutionary but who cares its still awesome. I have a feeling it has an awesome chance of getting goty. But who knows.
Trust me though there are a ton of other things I would like to say but I have to finish up some Home Work but I think you get the point.

Glad you liked it though.
But I think even though I already did it we should stop comparing Gears of War to Resistance. I mean Resistance is a launch title and Gears is a second gene game that had an impressive amount of time with the 360 where Resistance had to keep transferring over to other development kits because Sony kept purchasing and coming out with new ones so they didn't have the luxury Epic had when they were creating for an already made console.
I was just trying to show reasons why you shouldn't compare them and yes I know I did go a little into it saying Resistance was better than Gears but to be fair I just think Resistance needs to have a little bit of spot light on it for everything it has accomplished. Can't wait to play it this week!!!!!!!!!!