For me on profiles - 2 Strokes all the way:
1.Cheaper
2.Less moving parts
3.Did I say cheaper already

Fav engines Thunder Tiger pro 46 and Webra 32 and Webra 1.20

Also to me I get better control of an airlane with a 2 stroke. Although a 4 strokes torque is good for some things I find the excessive torque sometimes annoying depending on what I'm doing.