While some of the Xbox deals are very good, Xbox is practically always on offer, where as the PS4 isn't so much. I'm not even sure what the OneS RRP is anymore because it must be almost impossible to ever buy it at that. I think a couple of years ago Xbox also trounced PS4 in the way of deals but guess which still sold better. PS4 is being marketed rather heavily on TV at the mo and with the likes of Spider-Man, GoW, Detroit and BO all in the BF deals, I wouldn't bet against PS4 still coming out on top.
But yeah the PS4 deals do seem poor vs previous years.