I can provide a few details. I just picked up a 2.5-10x50 Weaver Extreme at ~$290. I can't directly compare to the two requested scopes as I do not have either.
I was curious about these scopes when they first came out, but there seemed to be very few reviews and/or information about them last year. But when I saw the current prices I couldn't resist. I have several Grand Slam scopes and have always thought they were very good for the $.
The scope is heavy, but not unduly heavy compared to other 30mm scopes I have. And not really all that long, although it is only 10x. All moving components function very smooth; side focus (parallax), turrets, rheostat for illumination, and eye piece focus. The turrets click positively and are 12 MOA per revolution. It appears to have about ~90MOA of total elevation travel and ~70MOA of windage travel. Turrets are very easy to re-zero. Pull up on them, then they will "free-wheel" around, once positioned (zero'd) push them back down.
The optics are very bright and clear. The eye relief is VERY forgiving. A full sight picture is very easy to obtain.
I mounted it on a Steyr 338 Federal I have. 4 5shot groups gave group sizes with what I usually get from this gun and load, it maintained zero throughout. These are 250gr loads and have a fair amount of recoil.
The illuminated reticle is just a very fine dot at the center of the cross hairs. In low light there is a little flare from the illumination on the highest settings, but the center dot remains crisp. The rehostat has 10 settings and can easily be read from behind the scope. As well the power reading is on the left hand side of the scope. So a right handed shooter can easily see parallax setting, power and rehostat setting from behind the scope.
I got the German #4 reticle and, in my opinion, the center cross hairs are way to thick. They appear to be 0.25moa thick. While at 100yards I was able to still shoot about the same, it felt a little more difficult for a precise hold. I was also shooting another rifle with a NightForce at the same time where the crosshairs are 0.08moa (very fine) and when switching back and forth the Weaver's appeared hugh. I would be curious if anyone else has the Dual-X on the Extreme and how thick the crosshairs are. The German appears to be 10moa between the thick posts and center cross hair and the thick posts look to be 2moa thick.
Overall, I think it was a steal for the price. My only real disappointment is the reticle.