Yeah, for some reason you seem to get more oomph out of higher capacity batteries, as well as longer run time. My SDS and circular saw definitely run differently with a 5ah vs 3ah battery.
And the same can be said for 2/1.5ah batteries lacking that aforementioned oomph!
^ this.
The first deal is much better. The 2ah batteries are shit.
@TGR - you definitely won't need more than those for home DIY stuff. They'll last a lifetime.