BGE is more powerful?

a few weeks ago I was working on a project with the BGE " version 2.70 " …
going to the website of blender I immediately downloaded " Blender 2.71 "
continuing the project , I noticed that this new version is more powerful and able
to process more polygons. For example : in the old version I had one model of 80 polygons
with SSAO provided by martinsh , multiplying this model, the game went from 60 FPS to 40 FPS
instead in version 2.71 while multiplying 20 times the same object , the game remained stable about
60 FPS. I want to ask is if it’s my computer or is it just due to blender ?
MY COMPUTER SPECS : intel core i5
8 gb ram
asus motherboard : Z87 -k
Video Card : Sapphire 7700 series .
P.S. (my computer has always been the same with the old version of blender)
thanks for the replies and bye!

If your computer has been the same then obviously the software has changed or been optimized. However while using blender 2.71 I had a lot of crashes when trying to use the python console for spawning in objects, so I might try out 2.72 but in my opinion the python side of 2.71 has something broken in it.

this is really strange… now i add DOF,BLOOM,SSAO and CHROM. Aberratio and it still work on 60 frame O.o