In the big world of farming the no till planter saves money, time and erosion for the cotton and various other farmers. They spray grass killer as the planter rows and plants the seed. Generally for more row crops IMO.
I looked up the overseeder, that just looks like an expensive way to "plant" the seeds (winter rye for example), instead of just tossing them on top of the ground. they will probably come up better with this thing.
But are you just doing basic small deer food plots? Usually we just disk up the area, broadcast out some seed, then drag or lightly disk again.