Hi flybubba,
Most of my previous aircraft have specified those speeds like this:
If you imagine a drag (Y) curve plotted against speed (X), you get a cup shaped graph. "U" shaped.
(1) Min drag speed is where the tangent is horizontal.
(2) Best rate is where the tangent goes through the origin of the graph.
(1) That is where you'll have maximum excess thrust at minimum speed = Best Gradient. You'll be limited to maximum 15 degs bank because of your stall margin so Min Maneuver is normally + 10 kts on top.
(2) If ATC ask for "Best Rate" - then the most sensible speed for economy and ROC is at that point.