Whilst one of the hex bar deadlift benefits is that it takes some of the load off your back and your hamstrings onto your thighs, this means that it isn't as effective at working these muscles. If you want to build the strength of your back and hamstring muscles, stick to the barbell.
Does hex bar deadlift work back or legs?
Hamstrings. The trap bar deadlift works the hamstrings, however to a slightly lower degree than a Romanian Deadlift and/or the conventional deadlift variations.
Are trap bar deadlifts better for your back?
Trap bar deadlifts develop the glutes, hamstrings and back. The main benefit is that they put less stress on the lumbar spine than barbell deadlifts which is important for people with back issues. ... From a risk vs reward perspective, trap bar deadlifts give plenty of bang for the buck, with a lower risk of injury.