The Konuspot-90 and the Celestron C65 MiniMak are both the same scope, built by the same people in China (Celestron is an American company and Konus is an Italian company--in this case, all they do is have their names printed on this Chinese designed/manufactured product).
The only differences are the Konus is painted blue, has a one-year warranty and a plain black carrying case, while the Celestron is painted black, has a lifetime warranty and has the Celestron logo printed on the carrying case.
I noticed no difference optically between the two, but I felt the overall finishing of the Celestron was better (smoother paint finish, clearer screen printing).