I have a 7 foot Land Pride LPGS, 6 foot Bush Hog ROBB & 8 foot Rhino rear blade. By far and away - the 1100# Rhino rear blade is used most on my mile long gravel driveway.
The LPGS will smooth the driveway nicely. It WILL NOT clean out the ditches nor maintain the crown. It will not plow snow. It will not move material from here to there.
I use the ROBB to move material from here to there. I scarify the potholes prior to repair. It will not maintain the ditches nor plow snow.
The rear blade will do most all. Even move material, if you aren't in a big hurry. Plow snow, maintain the ditches, maintain the crown, smooth the driveway. It will not scarify the potholes.