The speed for flaps up (V2+20 on my 601) will still give you best angle. A better angle than V2 with flaps 20. The enroute climb speed, commonly called Venr, gives you best rate. Which is what you want once above your platform except in very unusual circumstances. Its also slightly easier to fly because you are going faster and the fin works better so you need less rudder and consequently there's less drag.