I don't know about home depot's but the Sunex HD guns certainly look identical to the HF XT guns.
Myself, I own an 3/4" Earthquake XT, and I am none to impressed with it thus far. Emailed HF about it and got no response. Reverse torque is
NOT as advertised with the gun I own. It struggles hard and will not loosen an over torqued lug nut over 600 lb./ft.
First time out of the box it struggled loosening some lug nuts. I got out my NITROCAT 1250K 1/2" drive, and WITH an 1/2" to 3/4" adapter that beast of nitrocat didn't even flinch getting them loose.
I will say I like the feel and balance, and low noise level of the gun. It goes forward fine, and we verified with a torque wrench it'll get to at least 600 lb./ft. going forward. But if it won't loosen a slightly over torqued wheel nut on occasion, what's the point of having it?