The plane is not a copy it is a SIG Senorita. I have one from each vendor with the nitro one being used for spares. There are a lot of opinions in a thread at http://www.rcgroups.com/forums/showthread.php?t=1170386 but so far no comment from SIG.

Interesting thing is they are now out of stock at nitro but they say they will have a new shipment in 4/6 weeks + the manufacturer says they will sell them direct in 10 unit minimum lots.

http://www.alibaba.com/product-gs/27..._Airplane.html