The Enfield has a higher mag. capacity, has a "faster" bolt action operation and is roughly slightly more accurate than the Mauser.
The down side, the round is weaker, it is more front heavy, the stripper clips must be loaded properly, and it is not as stong of a design for close combat.
The Mauser is stronger, fires much cheaper ammo, is more forgiveing, recoils less (not by much)is not picky about how you load the mag. stripper clips, and is much stronger in close combat.
The M48 only really saw limited action in the Yugo civil war, where as the SMLE has served in probably 20 different hot spots before it made it to the U.S.
I am biased towards the Mauser, but really, either would do you just fine. I would go with the Mauser because I can get 3,360 rounds on strippers, in bandoliers, for $175.00, you can't do that with .303