Tallywell.

Collard greens (cooked) vs Kale (raw)

Both count toward 30 plants a week.

Collard greens (cooked)Kale (raw)
Protein · per 100 g2.5 g4.3 g
Fiber · per 100 g3.6 g3.6 g
Energy · per 100 g32 kcal49 kcal
Protein · per 100 kcal7.8 g8.8 g
To hit 30 g protein1200 g · 384 kcal698 g · 342 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.