Any of the grizz style dp's will catch coon. They all have pros and cons. I have seen no difference in push\pull or pull only trigger styles regarding catch rate. Use good bait and good scents and coon will work it until they get caught. The ring style trigger will let you use more diverse baits and not have cleanouts. Also if your setting at home like you should the push/pull will fire off more in the back of the truck. Yes there is a way to put them on "safety" that's more monkeying around on location.
As far as spring strength some have stronger springs than others. It doesn't matter on new traps. Over the course of time springs will need replaced on every model. So stronger springs in the beginning should buy you some time.
Advantage: Sterling Grizz
Stabilizers in unfrozen ground don't mean squat. I kill a bunch of coon every year with traps leaned against an object not in the ground at all when its froze. No I don't see more clean outs doing this. If its gonna freeze, I mean hard. The dagger and grizz stabilizers will cause BAD issues. If a 250Lb man has trouble getting it out of the ground a coon will hurt itself. Simple is good. Extravagant is marketing.
Swiveling action is fair on all. Simple is the key here again.
Advantage: Sterling grizz
Price between top of the line and bottom of the barrel is 1 or 2 coon at current price levels on a dozen traps. Nonfactor.
Advantage: Its a wash.
The coating on the Z's is nice its gone on the springs and restraint bar after 1 or 2 coon. Nonfactor in my opinion.
Over all if your gonna be in non freezing weather the grizz is the way to go.
In freezing weather T3 Bridger is the way to go.
I mostly use Dukes and have no complaints.
Kinda like Blonde, Brunette or Redhead. I prefer Redheads but a blonde will do in a pinch.
Small minds are tamed and subdued by misfortune, but great minds rise above them. -Washington Clark