600 watt vs. Two 400 Watt's

Small closet measuring about 3x5x5.5. air cooled 600 watt vs. two air cooled 400 watts. Right now I am leaning toward the 600 for overall easyness but discuss. I realize the pro's of being able to hang the 400's alot closer.

i did this with 1 430watt light. https://www.rollitup.org/grow-room-design-setup/167842-air-handling-4x4x8-430watt-flower.html



these are in the back on day 78.

600 would be more convenient in that amount of space

bump, i want some scientific backing and claims about the two 400 watts vs one 600