I appreciate all the responces. It reminds me of a guy I know who flew for the RAF during WWII. He was biased to the Spitfire as that was more manueverable and what he flew most of the time but in many more words basically said the P51 Mustang was a more durable plane. The Zero was a very manueverable plane and was more like a spit . So the question is balsa or coroplast .
I know real planes can't really equate to models but it's an analogy.
I would like to hear from those what have flown a trainer version of both SPAD coro or balsa wood or foam combo .

Should I just buy a US Aircore trainer ? If yes or no ... why?