Though the Tamiya is older, the only thing I like above the Tamiya in the Trumpeter is the fully molded exhaust pipe. The Tamiya has a weight as part of the build. Yes you can add your own weight but I find in these open nose aircraft to be difficult at best. Also the Tamiya gives you a tail maintenance stand should you wish to build it open engine. Other than that they are a similar build. If you like I'll try and scan in the instruction sheet for both maybe tomorrow.