That is potentially a pretty bad-ass lineup, sadly we have seen very little gameplay from any of those games.

The Order

Bloodborne

Toukiden Kiwami

MLB The Show

Disgaea 5

Drawn to Death

Everybody's Gone to the Rapture

Volume

Fat Princess Adventures

Godzilla

Guns Up

Hotline Miami 2

Kill Strain

Let it Die

No Man's Sky

Persona 5

Planetside 2

Rocket League

SOMA

Tearaway Unfolded

Tales of Zestiria

Rime

The Tomorrow Children

Tropico 5

Until Dawn

.....

I'm sure that I skipped a lot of small games, some of these may be delayed to 2016, but it's just what I can think of now, I don't really have a list...

I think 2015 has plenty of games for a variety of PS4 owners' tastes.

I will go with PS4 in 2016, but both line up are really coll!

Assuming nothing gets delayed and that both TLG and Horizon deliver, I'd say PS4 2016 in what games appeal to me more (which is mute though really, since MS 2015 lineup doesn't appeal to me at all), sales potential and high critical reception potential.

MS lineup for 2016 is at least on paper a lot more appealing than their 2015 lineup to me with Scalebound, Recore and Gears 4 all potentially interesting me.

Playstation 4 2016 > Xbox One 2015
Playstation 4 2015 > Xbox One 2015

Playstation 4 has a good line-up this year and next year it will be even better!

PS4. Especially considering all the other games, like Japanese titles, that are on PS and not Xbox.

For me xbox...

hmm, the only MS games I would buy are Halo 5 and Tomb Raider, and out of Sony's line up, I'd only get Uncharted and Horizon. However considering Tomb Raider is only a timed exclusive, I think Sony's line up is better. But Horizon could be delayed, and if that's the case, then MS is better.

PS4's, but Xbox's 2016 lineup could easily better then its 2015 one

So far:
Crackdown 3
ScaleBound
Quantum Break
Recore
Gears 4

To each his own, both lineups are very good.