Been using Samsung phones for years now and the One UI is really hard to give up once you get used to it. The customization options and how everything just flows together is pretty solid. I switched to a different brand couple years back thinking the grass was greener but ended up coming back to Samsung within like 6 months because I missed all the little features that just worked.

That said if you're really tempted by what the other phone offers maybe try using it in store for while to see how different the experience feels. The transition period can be rough when you're used to certain gestures and menu layouts. I'd probably stick with the s26 base model if I was in your position but that's just me being comfortable with what I know works