Mousemonkey :
How so?, An 8800GT has 112 SP's and a GTS250 has 128 SP's and can have a 55nm GPU whereas all the 8800GT's are 65nm GPU's without Hybrid power capability, so how are they the same?
All based on the G92 chip. Sure, the 8800GT is a slightly crippled version of the 8800GTS but the actual difference in benchmarks is quite small in comparison. Now, the 9800 series is a die-shrink version (later branded to the GTS 250), ultimately, the GTS 250 is an 8800GT on roids with a die shrink and more options.
Now, if you're talking 8800GT vs. GTS 250, then the difference is better than that of an 8800GTS to a 9800GTX...
GPU SP's Core Clock shader memory bus
9800 GTX G92 128 675 1688 1100 256-bit
8800 GTS 512 G92 128 650 1625 970 256-bit
8800 GT G92 112 600 1500 900 256-bit