okay, i have both, and have shot both extensively. Get the remmy, they will only go up in value, first. Secondly, the are the only rifle ever made, including remmy's 550, that will handle all 22 ammo, in semi automatic, due to it's floating chamber, and will do so, all within the same loaded tube!!!! you could load a short, a lr, a long, and a short, all together, and it will shoot them all.
now then, a mod 60 will be a bit more accurate, but not enough to really matter, unless you are shooting benchrest matches.
another thing the remmy will do, that no other factory rifle will do? Reliably shoot the massive Aguila sniper sss round, 60 grainer. most other rifles are either so innacurate as to be usless, or they keyhole downrange , after about 20 yds. not so with the speedmaster, made excellent small holes and groups, at 50 yds with mine.