As to what's better, dune boots or melee gaiters, that all depends. Factors very greatly depending on what's going on and your other gear. Owning both these and dune boots is ideal. That way you could swap em out as needed.
It's like the asking whats better, Shura Togi or Kirin's Osode. The togi allows for faster TP, while the osode allows for stronger attacks and WS dmg.
In KRT I would much rather have these and shura hidate, while farming or something else, gimme dune boots and melee hose.