Here it is from the easiest to fly, that doesn't mean the last one on the list is hard to fly, it simply mean not as easy to fly compared to the first one. Of course that's my opinion based on the kind of work I have been doing with those aircrafts, somebody else could have a different experience.
JD
1 B205 with regular blades stab bar
2 B205 with 212 blades stab bar
3 B212 stab bar
4 B204 stab bar
5 B214ST SCAS
6 B214B SCAS