If you're riding road most of the time and would have bought a road bike if one was available, I don't get why you're looking at mountain bikes.
Both of the bikes on your list have the bells and whistles that customers want, but to hit their price points, a lot of corners have to be cut.
60-dollar coil suspension forks are heavy (5 lbs for the Vaxa, 6 lbs for the Suntour) and offer very little adjustment. Cheap mechanical disc brakes are usually more trouble and no better than a simple set of V-brakes.

If I was looking at riding 70% pavement and 30% dirt, I'd opt for a more hybrid-style bike, unless the trails you plan to ride are gnarly -- in which case, these two mountain bikes probably aren't up to the job anyway.

Maybe look at a Raleigh Detour or something similar?