Not sure which one if any you have bught. I have built and flown both. They both fly very well. I think the GP version lands better then the other... Only problem I have with the other version is the wheel pants chatching in the grass. The other version is bigger. As far as what you are seing out there... The ebay cheap one are as good as the other ones sold under other names. If you get the GP one it is a straight forward build with the off brand you will have to do some mods to the landing gear. Any questions feel free to email me. I am putting a 26 cc gasser on my off brand don't think you could do that with the GP one. My off brand needed tons of lead in the nose with a 120 os pumped on it.