The Screw-Down Crown syndrome
It's obligatory at some levels but the screwing-down isn't what provides water-resistance as much as the seal on stem and case. I would take it in a heartbeat over the Rolex for its favorable pricing and availability.
The special Purist edition of a few years ago DOESN'T have screwdown, but is rated at 100M 10 BAR water resistance.
DEFY Classic prototype says 100M
Here are a couple of non-screw-down crown/stem designs, both shown in the open/setting position.
As you can see the Swiss style outer seals are still against the case tube, so water is kept out even when adjusting.
On this Seiko design, the seals are inside pressing out against the tube. Again the watch is sealed even with the crown pulled out.
I say go for it!