RE: Better of the 2 Rascals?!
I have been ready to buy and searching hard for a trainer for the last month.
After talking to a lot of people, and convincing them that I am not a total idiot with the sticks we all agreed that the Sig Kadet Senior was a great trainer. I am putting the new OS 4-stroke in mine, but it is built to run off any old .40 engine.
If you have never touched a sim or tried a club's trainer plane then get one of the basic trainers with massive diehedreal in the wings, but if you are at all comfortable with the sticks then look for something that will grow with you for a bit like the Senior.
At least that is my opinion, and I am sure others will disagree.