I have both the Lincoln 3350 and the ESAB Sentinel. In a more perfect world I'd have the 3350 lens installed in the Sentinel helmet shell. Both lenses allow very good visibility of both the joint and the puddle itself. The Sentinel helmet is much more ergonomic and once properly fitted, you would barely know you're wearing it because it's so light.
If I were Lincoln, I'd try to manufacture a better helmet around their already excellent lense.
Just my observations on these two. Just a matter of personal preference!
Everlast 250EX with cooler and WP20 Torch
Millermatic Mig Welder
Gas welding setup
A bunch of Snap-On tools
And a Brain