I recently switched from a kyosho calmato trainer to a sig 4 star 40 second plane.
It is true that the fourstar is very easy to fly and is still a trainer but I've found the following couple of differences:

1. taking off is much more complicated than a simple trainer due to the fact that you need to do many things at the same time from keeping up elevator while taxiing, then slowly release it as you increase throttle and at the same time input some right rudder which in turn will need to be reduced as the plane speeds up.
This is a reflex to the experienced pilots and rarely do they remember how difficult it is for a newbie. All I had to do on the trainer was to maintain heading with the rudder until airborn. And even that was tough and stressing at the beginning.

2. despite all the talks, this plane should be landed faster than the trainer. Yes it is slow compared to the expert and advanced pilots, it is still forgiving and floating compared to those advanced models I see on the field. But remember, we are newbies, we are still not at this level. I definately land the trainer slower than the fourstar, there is no doubt about it!

Nonetheless, I just fell in love with this plane, and I will never part with it. It's been two weeks now that I built it, and I am flying it every day!! I highly recommend it but I am not sure if I would recommend skipping the first month or two on a real high wing trainer...
I fly it with an OS 46AX engine and 11x6 propeller.