Inferior ... yes. As a form of Christianity. The lack of true charity towards other people, the lack of true brotherly love, shunning those who have not sinned against them, asking those of lesser means for money, etc. The big kicker is professing to be Christian while wholeheartedly sidelining Christ & replacing him with unworthy men.
I would say, JWs are followers of Saul, rather than Christ. Far too Mosaic Code to be Christian. They figuratively hunt and "kill" those of their brethren who may disagree. So, yes, that makes them inferior.
Also, they only have one celebration which is anything but a celebration. It's a depressing funeral ceremony (not a joyful wake/memorial).