Which one is better to use?

Skyrim Monster Mod adds directly to level lists. You can find nearly anything anywhere, and they're mostly random.

Skyrim Immersive Creatures is just what it says. Creatures are placed thoughtfully. You find Dwemer spectres in dwemer ruins etc.

So whatever you prefer. If you want mostly cool stuff to kill, then SkyMoMod. If you want something to enhance the bestiary of Skyrim while still feeling lore-friendly, then SIC is better.

Ah kk thank you. I think i'll go with SIC Then.

I went with MoMod because it made the game 10x harder. Stepping out of the first city and running into 20ft giant demons was really scary. If you are going for a difficult journey, then I would definitely go for moMod.

Also, there are alot more different kind of monsters, brings alot more diversity to the game. Plus you can get addons to make it more lore friendly so you don't run into dinosaurs and such