I got the Steiner P4Xi 1-4 and the RT-6 1-6 at the same time and compared them for an affordable carbine/3gun optic. I wanted to like the RT-6 more because I wanted the extra mag on top, I generally like Burris, and it was about $100 cheaper.
It didn’t work out that way. I kept the Steiner because it was SO much better in eyebox, clarity, fisheye, and dot brightness (liked the reticle a little better too). This is back when the Steiner was $470; now that they’re closer to $600, for a fun gun in .22lr I’d get the Burris at $350.
I don’t know if the new 1-6 Strike Eagle is any better than the old one, but the RT-6 is a BIG step up from the old Strike Eagle.