"The Shallows" seems to be an attempt to forge a marriage between critic friendly drama ("Open Water"?) and plebeian friendly entertainment ("Shark Night"?), although the relationship ends up being somewhat turbulent, if passionate.
"Wilderness" is actually a slasher/ survival thriller hybrid with plenty of action. It offers nothing I haven't seen before, except maybe its adoration of asshole characters, but it's packaged nicely in a briskly paced, gory, thrill ride. That is enough to satisfy my questionable tastes.