A Jug choke is easier to load and clean than a screw in. The screw in is more flexible (you can own an assortment of choke tubes). I think a Jug choke will cost you more to have done. A screw choke also requires enough barrel thickness to allow machining out for the screw tubes. I think the jug looks better (the muzzles look cleaner).
And you will never misplace a jug choke (aren't they also called Tula?) or gat it stuck in the barrel. ::