Do you have data on whether the xbox one supply that's not sold out is five times the amount that is? Because I seriously doubt that's the case, and it wouldn't surprise me in the least if microsoft diverted supply to the UK and U.S over Spain.
The initial conclusion everyone came to when PS4's where nowhere to be seen, including the UK & US - while XBO was in decent supply - was Sony are somehow behind the game in their supply or stretched thinly.
As more figures come out - including the UK software charts were PS4 titles have risen in the charts & XBO titles fallen - is large amounts of PS4 stock is going into the system, but being sold out in no time at all.
I've seen it for myself in the UK, you've literally an hour at most to pick up a PS4 when a store (online or highstreet) gets stock. This is Xbox's second largest market, ad's are never off the TV, consoles have been available for 2-3 weeks, but the software charts aren't showing the bump PS4 is.