EVO will never be able to match the Galaxy S performance (Epic)...while they are both 1ghz processor the hummingbird processor is a lot more efficient due to the 45nm and the built in hardware video decoding. There is also the SGX540 for graphics processing.
The EVO in comparison is pretty much at least 2x inferior if not more for graphics due to the weaker and older snapdragon processor.
Here is some benchmarks, the "Your Device" is a Galaxy S running 2.1 with an IO fix...the other Galaxy S benchmark on there is before the IO fix and using beta firmware....the Nexus One < 2.2 is pretty much where the EVO is with he 30fps fix.
