I am looking to buy a new fuzz pedal, either a Big muff or a Fuzz War, i was just wondering if any of you own any of these and if you would share your experiences thanks!
One is more expensive and they sound different.
Get a different boutique market Muff clone. The Earthquaker Hoof or the Blackout Musket. The Devi Ever Hyperion is also a good muff-esque choice.
Out of the two? I'd choose the Big Muff Pi without a doubt.

However, there are a lot of great pedals in the same price range that will get you more sounds. Way Huge Swollen Pickle is a great example.