Well if size doesn't matter, then personally I would go for the 33. One of the things I enjoy about the 22 and 33 line is the ability to exhaust air thru a hose connected to the round exhaust port. That feature went away in the newer CT line.
There are two primary uses: One would be ventilation. I have done work in a dust enclosure and used the CT to collect airborne dust and have the filtered exhaust air exhaust outside the enclosure. Creates a slight negative pressure. You could exhaust the air thru a partially open window also. The second one is that you can connect the exhaust of one CT to the inlet on another and pick up performance. I admit that I don't have two so that isn't something that I have tried but I read about it here. It might be an interesting thing to try with 50 mm hoses and stationary tools if you were in a shop situation and had several electrical circuits available.