A T-Rex with a silver arm has better attack, while a T-Rex Lord has more health.. The best super evolver in the game(IN MY OPINION)is Shenliu, having the best hp in the game,besides Zongazonga,though 17 hp difference is not going to do much.It has an attack close to a normal T-Rex,at 87.To me,those two are the only stats that matter.Its strong attacks are reasonably priced,too.