Nah A1200 was just more colours for me, also there wasn't that many "new" games for it just ones with new colours.
Then i take it you never owned one!
2 megs of memory (A500 0.5 mbs/1mb)
3 new custom chips, alice is one of them im sure but they helped to boost performance
Have you ever played frontier elite 2 on the amiga? i did on the 500/600 and 1200 , anyway there is a bit in the game where you can look at the universe in a digitized form but when you do it has to draw it...
On the 500/600 its slow slow slow as on the 1200 its runs really smooth and takes about 20 seconds .
Its more than just colours my friend much more but i guess its what you had back in the day and your going to defend it as i with the 1200
paul