MU2 v2.0 4 and 5 blades propeller

[alexdm]

The new MU2 comes with  4 and 5 blades propeller versions. My understanding is that 4 blades are more efficient than 5 and 5 are more powerful (but with more drag) than 4. I woul lik to understand the criteria and the implications for choosing 4 blades or 5 blades. For example, why choosing the one or the other and what to expect.Many thanks