Not that familiar with SRAM stuff, but I would think it would be comparable. probably better than theEF50. The only issue has to do with the integrated brake/shifter. Technically you have to replace the entire unit and the SRAM are just the shifters without the brake levers. You might be able to cut the shifters off the old integrate brake/shifter unit, but I have no clue if the SRAM will fit with your cut levers without moving the shifters off to one side.
If you are only going with the right shifter, this one looks to be a better bet, and they end pretty low also.
Shimano Alivio St M410 Right Brake Shifter 8 Speed 22 2 MTB Cross Bike New | eBay
And you can always see if there's anything local as suggested above.
John