Gigalith or Golem for Stealth rock Explosion set?

Question

Moves: Stealth Rocks, Explosion, Earthquake, Stone Edge.
Item: Custap berry (for priority explosion)
Ability: Sturdy

which one goes better with this moveset?

Answer 1

Gigalith

Well, for both you are going to be using the same set so movepool variety doesn't matter that much here. Plus, it has better stats in every aspect except speed. Speed won't matter anyway because both are quite slow.
A great set would be:
Gigalith @ Custap Berry
EVs: 252 Hp/8 Atk/200 Def/48 Sp.def
Ability: Sturdy
Impish Nature
-Stealth Rock
-Rock Slide/Stone Edge
-Explosion
-Earthquake

Hope this helps!