Do you think that this whole thing could be a metaphor?
Like, Venom embraced the suit. Venom was in a position on power (or so he though). Peter, on the other hand, denied that power to be a good person. (Don't let power get to your head).
Spidey was originally strong. So symbiote Spidey is allegedly even stronger. Then, Venom is allegedly stronger than Symbiote Spidey again. But I think perhaps some of you are missing the point behind the power that Uncle Ben was talking about - power doesn't necessarily mean physical strength, it can often mean emotional strength. Eddie Brock was in a very fragile state, he was getting depressed, etc, when the symbiote took over. Peter, on the other hand, got the symbiote when he was in a position of emotional and physical power, which gave him the strength to choose whether or not to fight off the symbiote. Even after he shouted at Mr. Ditkovich, he chose to take off the suit.
However, when Harry forced MJ to break up with Peter, Peter got angry and chose to put the suit on to fight Harry - but by then, he was emotionally fragile, and the suit made him lose self-control. Venom, on the other hand, wanted to cause as much pain as possible, and let the suit control him. This shows us one thing; that Brock is emotionally fragile inside, and physically strong on the outside, while Peter (symbiote or not) is an emotionally powerful person, as well as a pysically powerful person.
So based on the above (I don't know whether it made sense to you at all) I am going to assume that Peter was stronger with the symbiote suit, and is still stronger without it. It doesn't necessarily matter whether Peter got hurt from Venom's punches, or vice versa - sometimes it is, as the cheesy saying goes, it's what's inside that counts.
Now, the dancing scene: just to clear something up, I believe it was not meant to show Peter deliberately being goofy etc when he was all angry before. It was put in to show Peter losing self control and doing things he wouldn't normally do - as it says on the back of the DVD, Peter gets
over confident.
Also, one last thing: If Venom swung through New York from the black goo, does that mean he stuck to the wall with black goo on his fingertips? *shrugs*
Thank you for reading
(and please, if I contradicted myself, let me know - I sometimes lose track of these things :S)