It's more that the guy who maintains ReVanced was such a dick to all the contributors that many of them up and left, and made Morphe. All the big changes that ReVanced made in the past year or so are only because the existence of Morphe forced the maintainer to get off his ass and start actually accepting updates.

Morphe is a much more feature complete patching solution now, and features a lot more apps with the additional patch sources you can add.