Of all the clients I have tried I like Primal's UI the best. Wisp is okay. Not too dissimilar from Amethyst IIRC. My draw to adding Wisp to my stack was for very specific reasons: more emoji's than only the heart, getting around Primal censorship when needed, seeing DMs that were not coming through in Primal, and, most recently, the option to add a Monero wallet which isnt available in Primal. But Primal is still my daily driver.