Greetings JH420
Good question...Great 'trick' question.
You've failed to disclose how much the room is currently yielding. Given the stipulation of "
mastered growing in soil", it's quite possible that the garden yields at its pinnacle point.
Also: one can't assume what the limiting factor for the garden is. Your circulation and ventilation could be well above par, your ratio of bio mass to cubic space could be under, your ambient temperature and relative humidity too low, your rhizospheric area too small, improper nutrient uptake and assimilation (organic), improper nutrient profile (inorganic), all and any of which would make the addition of supplemental Carbon Dioxide moot.
As well you asked:
Which setup do you think will lead to larger and faster yeilds?...JH420
All other variables being equal, hydroponically cultivated plants outperform soil cultivated ones, especially in the categories of larger and faster yield.
Even if putting that fact aside, the stipulated method is "
hydro tables and all that goes with", which implies greater plant numbers, which in turn should translate into greater yields with less necessary vegetative time (faster).
Sincerely,
Charles.