I'd use the second room.
SOG means "Sea of Green". You fit as many plants into a room as possible and grow small, yet many plants. I would cut the bottom third of the branches off as they won't be getting much light anyway and it will allow the air to flow through better.
Example:
I have a 2'x4' 32 site aeroponic set up. Thats 4 plants per square foot. The only buds that are really going to grow are the colas, whereas in other set ups, you would have smaller buds towards the bottom.