Different commissioned artists have different art styles. I enjoy the first image of Tasha, while the (I assume) elven ranger I find not very pleasing to my eyes despite it being rather well done. However, I also cannot stand the vast majority of the monster art in the Monster Manual done by the Conceptopolis people. Again, their skill is definitely visible, but holy crap do they not look good aesthetically (to me).
Of course, I am an outlier on these boards in that I enjoy much of Wayne Reynolds's art pieces (except for his goblins in Pathfinder, and Pathfinder2e's kobolds). There have been artists in previous editions that I really enjoyed and some that I absolutely loathed and thought the product was ruined with their inclusion.
For me, Paizo commissions artists with art styles I prefer while WotC seems to prefer artists with styles I cannot stand for the most part. Art like Tasha, that is clean, is miles better than art like the elven ranger, which looks like someone trying to recreate the look of "classical" artists oil paintings.