Tallywell.

Sweet potato (baked) vs Potato (baked, skin on)

Both count toward 30 plants a week.

Sweet potato (baked)Potato (baked, skin on)
Protein · per 100 g2.0 g2.5 g
Fiber · per 100 g3.3 g2.2 g
Energy · per 100 g90 kcal93 kcal
Protein · per 100 kcal2.2 g2.7 g
To hit 30 g protein1500 g · 1350 kcal1200 g · 1116 kcal

Bold marks the better side of each row. "Per 100 kcal" answers the density question — which food delivers more protein for the energy it costs. Portion row is computed live from the same USDA base values shown on each food page.