There should be next to no difference in content. In theory, de-federation could lead to a difference. E.g. if lemmy.world de-federated with someone, feddit.uk would still be able to see and interact with it.
In practice however, basically the same.
I’ll admit I was a minor fan of him. He seemed to have his ego pointed in a good direction. It was around the time those kids got stuck in a cave that I realised something was off.
I was never a hyper fan, but I’ll admit I was completely taken in by his PR machine, for a time.