I think Shift is better than Deep Onion in my opinion.
What makes you thinking that? I am always glad for serious informations or some deeper looks into someones decisions. So please help me out. In my opinion, it is always better to have a few coins of a nearly same kind. Because a good competition will motivate every serious dev-team. In the end, we will have better coins. And if we are creating future at the moment, we should do it in the best way we can. Competition is necessary for that.