SPS pay may be more, for specific non-witnessing tasks, split up between multiple people. Also, almost half of total SPS funding is for @sbdpotato, which is to be given back, so not really "pay".
But that's largely irrelevant anyway as most witnesses aren't receiving anything from SPS.
Top witness at $0.20 STEEM makes about $19000 per year gross (before expenses, taxes, etc.) and backup witneses (including some involved with and contributing their time to this whole 'takeover' issue) make 1/4 of that or less, in some cases much less.