shifting is on par i guess, maybe the shimano stuff is even better. expect 10-15 g weight savings when using the PC-99 hollow pin chain by SRAM. given you wanna stick to the 11-32 gearing, the XTR cassette is about 40 g lighter than the lightest SRAM cassette.
but check out weightweenies.starbike.com for more detailed weights
but check out weightweenies.starbike.com for more detailed weights