IMHO, the Sparrow will keep it's edge. Mainly because it's easy to clean, i.e. the clamshell. For people like me who like multi-purpose cans. I wouldn't even consider the Surefire, unless the surefire is rated up to .22 Hornet,,,,
I'd wait for some reviews as well, before buying. Still a pretty new can/design,,, My .02 cents.