haven't seen any benchmark, but the old culv processor is probably faster than the bobcat cpu while the amd gpu is faster than the intel 4500
my sister is using a su7300, ati 4330 and a crucial m4 for personal productivity and she's quite happy with it, we paid that laptop around 500$ (plus the crucial m4 a couple years later) and she gets close to 8 hours of battery out of it on a 1.3kg machine... one of the few convincing laptops ever made from acer (timeline 4810tg).
Since you don't want to play gaimes the SU7300 should be better, it's still a 1.3ghz core2 cpu... save up some more and buy something faster? 🙂