22" or 20" barrel

[Bassfish1952]

Looking at the howa mini 6mm arc.  What are the pros and cons of the 22 or 20 inch barrels? Thanks in advance.

Not sure there is enough difference in the 2 but to me (a hunter) longer is better My 6arc is a 24" barrel
But I am more concerned about the 1-8" than length . I have 1-7.5 and there are some bullets that require a faster twist than I have.
Whatever you get let us know how you like it.
I am thinking of a Howa barreled action to build another 6 arc but I just want the action I would put a custom barrel on it