Which one - A700 or A100?
Ok ... first off ... the A700 is everything the A100 should have been, two years ago.
That being said, for all the the A100 delivers and can deliver, it is probably the "bargain of DSLRs."
So, which one goes in the shopping basket?
Well ... if you are seriously going to use what you buy ... it has to be the A700.
If you aren't going to touch the camera except for routine family shots and what not ... it's the A100, without a doubt.
Remember that both models use the same lenses, electronic flashes, releases and what not. The A700 is designed around more external expandability than the A100 was and delivers a higher ISO, more resolution and an improved anti-shake feature.
Again ... buy the camera you are going to use ... the A700 is the A100-refined to just the right degree to be ... primo.
Judging from the first and only shot ...
Okay, judging from the first and ONLY shot I've taken ... it's a little tough to say. I suppose there maybe something to that ... but, the A700's sensor (CMOS) is entirely different from the original A100 (CCD) sensor.
Looking at the two shots I took, at lunch ... there is some difference, but then again, I was "smart sharpening" up the image I took with the A100 for presentation purposes, not an image quality comparison, so it really isn't fair. There is no sharpening on the image I took with the A700. It's was simply converted and resized.
When the new TAMRON 180mm MACRO lens shows up ... then we can do so image comparison ... to a gnat's a** ... uh, make that 'behind', there are children present. :o