if you had to overvalue one attribute, power would be a good one to pick. Both of these players have very good approaches at the plate. it's really a question of preference whether you like .280/.350/.450 more than .300/.380/.420, just to speak in general, purely theoretical terms.
besides, we're comparing Benintendi to a palyer who is currently leading the league in BA and putting up a slash line of .346/.397/.495/.891. If he can swing that well, the question of whether to get high OBP's based on walks or putting a great swing on the ball, is kind of a moot one.
I seem to recall another shortstop we had in living memory who didn't take a ton of walks, but put up that kind of slash line on a regular basis due to elite offensive skills. Just saying. I know we're all trying not to put Nomar on bogaerts, but it's exciting to see that kind of talent at our shortstop position and an end of the shortstop roulette we had to deal with from year to year ever since.