I use both but on Versa 1. I have no pro's or con's at all. Has not affected functionally in any way on my part. Full bezel protector is there to stop me catching edge of screen & fracturing it & the glass screen protector is there to stop me scratching or by impact cracking the screen.
I procured both from Amazon. Screen protector sold by Tersely & full bezel by Caseflex. Peace of mind more than anything else. I also upgraded the strap to soft silicone lots of holes' to help stop skin rash too. Seller is Kmasic.