If you plan to leave anything plugged into those outlets, the cords hanging down from the strip under the cabinet will look far messier than having the outlets in the backsplash. Not to mention it’s annoying to have to crane your head under the cabinet to plug things in.

And if you go with outlets in the backsplash (which is what I would do), I’d recommend having them lower down than in your rendering — they should be much closer to the countertop.

I would choose to use the outlet strip (plugmold) in those 2 sections, but not if you plan to leave a small appliance plugged in regularly.

The renditions seem to have the lights positioned at the back of the cabinets - based on the backsplash being so lit. You want them at the front of the cabinets to better light your work surface. So, that might determine if you choose the combo with outlets or not.

Reaching and peering up under the cabs to plug things in would annoy me more than the visible outlets in the backsplash. YMMV!

If you do put outlets in the backsplash, do position them as low as is safe (not so low to put them at risk of contact with liquid) and turned horizontally - less obvious that way.