User blog comment:BannedLagiacrus/Monster Appreciation Week: Akantor(4th Gen)/@comment-25119729-20150929163723/@comment-5569775-20151001031055

While the Akantor do hit higher than Ukanlos, it's not by much. An Example of the average hit from both GS's with a Sharpness +1 set and using the Overhead Slash on a G.Jaggi's head: The Akantor will hit four roughly 168 damage and the Ukanlos will hit for roughly 164.

That doesn't mean you have to use either though.