Glad to see you're enjoying yourself designing on TGC - It's got a great designer, once you get to grips with its quirks, like the blue and red brushes and when to use each of them.
I'm travelling the other way at present and I'm loving playing PG - I bought it last week!!
I'm even thinking about giving Unity another look soon because I can see me playing PG for a long time to come, and it would be great to be able to play my own creations on it in the future, once Course Forge is released.
I really am having a blast with TGC's course creator. I was losing patience waiting for course forge so I went ahead and purchased TGC for the sole purpose of it's course designer. I haven't played PG in about a month but once it's a full game with the CF I'm pretty sure I'll probably be back with PG fulltime again. I got to tell ya, some of the designers for TGC make some beautiful courses...very impressive stuff.