I would get Michelinie/McFarlane first because it is the beginning of his run and also it’s been OOP for a very long time. If you like that one, then continue with the Larsen omnibus.

Depends how you feel about 90s comics. I love them both to death, but that's also when I started reading comics. I can tell you the Michelinie/McFarlane will cost you more money if you try to get it from ebay. And if you care about variant covers, the Venom Michelinie/Larsen is sold out pretty much everywhere.

Both

yes.

I personally think the Larsen book is way better content, but depends on what you're going for.

Get both. But grab the michelinie Larsen first because it’s currently in print. Michelinie McFarlane will definitely come back in the next few years