article in "the land", page-9

COZ is a more conservatively positioned tree planting play than CCF.

Off the top of my head:

COZ more diversified (e.g. owns carbon banc)
CCF more debt
CCF more bullish on profits
CCF more "investor relations" oriented
COZ very tightly held (top 20 = 70%)
CCF more liquidity, volatility
CCF "growing" quicker

just as a disclaimer I own COZ and not CCF so I might be biased but not intentionally

I would have sold at 28 c to be honest - I would probably hold though if you're happy with the risk profile.

I will buy into CCF on a market overreaction to bad news but otherwise am happy with exposure to the sector through CO2 Group