MARK STONE (last two seasons):
1.24 goals/60
2.18 assists/60
15.8% shooting
6.9 CF% relative
100.5 PDO
53.5 oZS%
JASON ZUCKER (last two seasons):
1.44 goals/60
1.46 assists/60
14.0% shooting
2.5 CF% relative
102.6 PDO
42.9 oZS%
Zucker pulls ahead in goal scoring, but Stone still has a sizable lead in overall point production.
Possession number change only by a small degree because I've used either GP or TOI to estimate the two-season averages. Technically, units of time have no impact on these possession rates.
I'm speculating, but I assume you've only asked for rates per season specifically for Zucker's benefit (since he's only missed three games in the last two seasons, to Stone's 35).
I can't speak for the others, but the only argument I'd make here is that:
1.) Stone's offensive numbers over the last 3 seasons are absolutely better than Zucker's.
2.) The degree to which Stone's (non-possession) numbers are better goes down if you take away powerplay time, where Zucker hasn't seen much time until this last season.
3.) Looking just at 2017-18, the gap isn't as big as it was from 2015-17.
4.) Looking ahead, I think Zucker's numbers will be closer to his 2017-18 season than 2015-17. That might reek of optimism, but the biggest difference for him last year was the increased powerplay time and better linemates. His 5v5 scoring and shooting percentage stayed about the same, and I don't expect he'll be bumped from the top-6 or lose powerplay time going forward.
5.) Ultimately I think Stone's the better player, but I don't think the gap is wide enough to justify some of the histrionics in this thread. That's nothing new, though.
But none of that amounts to an argument for accepting Zucker+ for Stone. Like I said earlier: I think Ottawa either extends him and keeps him, or can't extend him and trades him for futures. I don't see Zucker being appealing in either case, regardless of how the two compare.