I'm wondering, Topps is as tough as nails and has beaten back Chomper's dad, the Velociraptors, Belly Draggers, and Red Claw, and I think he might have fought Fast Biters again in film 11 too.
On the other hand, Shaprtooth can just really well, can survive at least one tail whip, took down Mama Longneck, or at least had a role in her demise, fell loads of feet during an earthshake, and is generally hard to stop.
Assuming the two got into a moral combat, who would be the survivor?