Riley has fought reapers.

Robin has fought Chelicerates.

Riley has fought ghost leviathans.

Riley swims faster, which means that he has got better psysical abilites. Robin is slow as heck. Robin hasn't even got a stasis rifle (skill issue).

Hmm, I mean Robin only takes 30 damage from the Cryptosuchus which seems like it would do more, but I guess the Sand Shark too. It would be pretty even, but I think that because Robin cannot unlock the Stasis Rifle or Repulsion Cannon blueprints, freeze with Stasis Rifle + shoot with Repulsion Cannon = get absolutely yeeted bozo

Oh wait, I have 3 questions; Do they have weapons? Where are they fighting? and what is their condition?