So Intel has just released new mobile parts using an 800 fsb. Other than the power envelope the T's using 35 watts and the E's using using 65, would their performance be the same?
The T7100 vs E4300 should be dead even performance wise. The only difference would depend on the motherboards you ran them on and what memory you were using.
The T7300 should be quicker than an E4400. They run at the same frequency and bus speed but the T7300 has 4MB cache vs only 2MB for the E4400.
The power ratings are somewhat misleading. The entire line of Core 2 Duo desktop processors are rated at 65 watts but obviously an E6700 is going to consume more watts than an E4300 at full load. The mobile processors from the T7100 to the T7700 are all rated at 35 watts but once again the faster T7700 will consume more watts than a T7100.
If you were to run a Core 2 Duo desktop and a Core 2 Duo mobile processor at the exact same frequency and voltage, the difference in power consumption would be minimal.