Skis with grip zones are much easier for beginners - that's the main thing. A grip zone (microscopic roughness on the ski's gliding surface) provides traction with snow without any extra work. You just grab the skis, put them on and go - no need to wax anything before heading out. With wax it's way more complicated: you need to know which specific wax to use depending on snow temperature and moisture, how to apply it properly, then scrape it off. It takes experience and adds hassle before every outing.
That said, waxed skis glide faster and are better for people who've already figured out they actually enjoy this and want to progress. For a beginner they'll just be a headache: either you don't wax them right and the skis slow down, or you wax the wrong thing and throw money away. Plus if you store them wrong, the wax can damage the gliding surface.
My advice: start with grip zones, ski for a couple months and see if you're going to take this seriously or if it's just a one-time thing. If you get into it, you can always switch to waxed skis or learn a mixed approach later. Honestly, for winter walks and casual skiing, grip zones are comfortable and last a good long time.