Seriously?? The guy has won 4 challengers this year... Is it that impressive to you? Berankis OTOH is coming back from a grueling injury period, wait till he can play full season, then we can compare the rankings and the results of these two guys.
Speaking about aspects which you mention Klizan has advantage in, I really doubt that the guy moves better than Rycka, Berankis is a very smooth mover, has great hands, powerful serve, for his 175 cm height and a big forehand too, plays very aggresive tennis all the time.
I think this match is on Berankis' raquet.
OK, Klizan has won 4 challengers (which is not that bad, I guess). But look at his current form. Great US Open and other excellent recent results as well. This Klizan is for real, so deal with it. His ranking is not overrated, he has still potential to move up. Berankis is similar to Klizan in a lot of aspects, but I would say Klizan is more consistent and in a better form now.
This match could still go either way, of course. But Klizan is definitely a slight favorite here. Hopefully he isn´t tired yet, guy plays tons of tennis now (he is also in doubles SF, defeating 2 very good pairs there).