Well, as long as we're going all "X-Files"-ish here looking for symbolic imagery and hidden meanings...
I've always thought TPTB/SV delighted in the little "inside jokes" and meanings through out the series.
For example (and as pointed out by many others in this thread), there's the whole "messiah" connection thing going on. In the pictures above I think an obvious one pops out. In both pictures the cherub (little angel) is in the presence of those who know "the secret" (Ma, Pete, and of course Clark), and is clearly (to me anyway) acknowledging that fact ("Shhhhh, its a secret").
However, note in the first picture, the camera angle is such that the little angel appears to actually be facing directly at Ma and Pete. He (the angel) is addressing them directly ("Shhhhh").
In the second picture (and in the presence of the "messiah") the camera angle is such that the angel appears to be averting his gaze downward as though he is unworthy to look at Clark directly. But his message is still the same ("Shhhh, its still a secret").
OK there boyz and girlz, if you think that's a stretch, wait until my next post. (See below)