I've had a lot of Lib Tech skis (11 pairs or so) over the years. I have not tried the newest iteration of the UFO. The current version of Magne Traction is pretty neutered, so its impact is pretty minimal - I would not really factor it into the decision.
Lib's are decent skis at affordable prices. I personally think that their older skis - or NAS - were built better (heavier, more bombproof constructions) than their current offerings. The current skis are for the most part fairly light, but are also lively and their graphics usually pops like crazy on snow. The narrower UFOs were the better of the older UFOs, though the current iteration of 115s is a bit stiffer - so probably less soft snow specific (the old UFO115 is probably the worst ski at mach schnell on hard groomers that I've been on). Wundersticks are easy to ski skis that still retain a fair bit of punch and can be skied fairly hard (I've owned both 106s and 118s).
Lib's/Mervin's quality assurance and quality control leaves a bit to be desired imho. Basically, Mervin has set in place very few measures to ensure a consistent build quality / parameters within a pair of skis other than "they are built at the same time, so they must turn out similar enough". At least that is my understanding based on discussion with them on the subject. I've had several products not meet my standards. For instance, a GoldMember split that I bought had the screws recessed far to far into the bases -> they would not get sufficient support and would have worked their way through the bases/into the core (not remained watertight) upon hard use. I also bought a pair of Wündersticks118 that had a massive 125gr weight difference within the pair. The design weight of the ski is 2177 a ski, mine weighed 2000 and 2125. So yes, they did not ski identically - one was noticeably stiffer. I would not have minded a pair at +/- 25gr at 2000gr, 2125gr or 2177gr - all would have skied well.
They are still fun skis. My main takeaway is that Mervin are producing with an increasing focus on number of units, but with insufficient focus on building bombproof skis. I have not seen any 2021 products, so things could have been put in place over the last year to remedy my concerns. That being said, their pricing is pretty great - especially for where they are made.
I have this weird spot of really liking their skis and their ethos - they were my first skis after 15years or so on snowboards, but being off put enough by my last 3-4 purchases that I probably will not be buying from them again. I really want them to prove me wrong and turn things around though, and I would be happy to try any current UFO or Wunderstick.
