Barrel size question??

[Inquisitor]

I was looking to get a J&J ceramic barrel but I cannot decide on 14" or 16". The 14" is prob better for being more compact and out of the way but will the 16" be more accurate with Co2. Will the 16" suck up too much Co2 and inturn decrease the accuracy? If the 16" is more accurate I will get it.

Thanks