Ps4 one is the better deal there, especially considering it's a last gen console, but wouldn't getting a xbox one make more since then getting a 360? The Xbox 360 is from two generations ago (Ps3/360 era) so unless you want a retro system, its not really worth getting now.

I would suggest looking up Ps4/Xbox One games and used system prices on Google to see what to expect for consoles prices, and what games your interested in. Do you prefer games like Gears of War, Halo, Forza, Sea of Thieves etc. or do you prefer games like Uncharted, Spiderman, God of War, Last of Us etc.? That is usually a big factor in what system you should choose.

Anyways, I rambled on alil, but the Ps4 in that situation is the better deal of the two, especially since new games are still being released on it.