Theoretically they're exactly the same. Realistically most people find that SRAM Red powerdome cassettes are noisier when shifting. On Shimano D/A cassettes the Ti cogs will wear faster than steel cogs of the same size.
To answer your question precisely, i can see no difference in actual shifting performance.
i work for some bike racers...
2013 Trek Madone 5.9 w/ '12 SRAM Red
2010 Cervelo T1 sprint bike
Smith&Wesson M&P 15-22
Smith&Wesson M&P 9
oh, those belong in another forum