Gelifluction vs Solifluction
Solifluction is not restricted to cold climates. Gelifluction on the other hand is, it requires by definition a permanent/seasonal layer of frozen soil. In periglazial environments the porewater above the frozen ground layer becomes easily saturated. Solifluction encompasses numerous processes, Gelifluction is one of them...

The wikipedia page for Solifluction provides more information.