The thing about Alabi is that he doesn't have the natural feel (or the mentality) of the game, like some others do, like say Magloire or even Gray. Alabi is limited on BBall IQ... can't complain about it through because he grew up back home (where their is struggles) and started too play basketball at a late age, just cause of his size and athleticism. But he is a hard worker.
Now Valanciunas has the same fitness, body type and athleticism as Alabi, maybe a slighter edge for Alabi over Jonas. But dayum, when it comes to Basketball IQ and passion, Jonas by a longrun, and he is younger too! but thats cause he has that natural passion or feel of that sport, rather then Alabi where he most likely considers it a job, where he tries to do the right things in that limited playing minutes...