It sounds like both of these kids will be fantastic players. The reason I prefer Cozens is we could use another goal scorer/shooter. We already have Bratt who is more of a playmaker and while Nico can fill the net, I view him as a playmaker first. It also remains to be seen if Zacha will profile as a set-up guy or scorer (hopefully he continues to develop and excels at one of these areas). I also like that Cozens can play C or RW and is a big kid. That kind of flexibility is nice, especially considering RW is an organizational need. His combination of size, speed and scoring acumen is really appealing. It sounds like the only discernible advantage Turcotte has over Cozens is his two-way game is more complete at this point?
Right now Cozens is preferable for several reasons which you highlighted, but I think there's only a very slim chance he's still on the board after 4 picks. He seems to have usurped Dach on most draft boards for "best WHL center prospect". With Hughes and Kakko pretty much locked into the 1/2 slots, I'd say Cozens is the favorite to go #3. While there are a few teams I could see considering Byram at #3 (DET, VAN, NJ, BUF) and a few teams I could see considering Podkolzin at #3 (NYR, LA, FLA) -- even in such a scenario, Cozens would be an overwhelming favorite at #4 and I'd be downright shocked were he not picked by #5.
The reason I keep hyping Turcotte is that, as things stand, the Devils have significant odds of drafting at #5 or #6, when Cozens is off the board. Turcotte rates extremely high in all the categories which Shero and Castron seem to hold in crucial regard (skating, hockey IQ, compete level) and is, without much doubt, the best two-way forward available in the draft. Though this is important to note, what's getting lost in all of this is that Turcotte is also a dynamic offensive threat who seems to control the flow of play every time he hits the ice. Though Cozens will score more goals, Turcotte will have incredible possession stats.
So, to answer and agree with you, if NJ was drafting fourth and Cozens and Turcotte were both available, who would I want? Like you, I would take Cozens. But it's important to note that Turcotte is not a consolation prize -- he's a downright prize. This is my Devils wish list for their lottery pick (not my rankings, which are slightly different). I'm only going top 8, since I do not think there is any way the Devils draft lower than 8.
1 Hughes
2 Kakko
3 Byram
4 Cozens
5 Turcotte
6 Zegras
7 Krebs
8 Podkolzin