Thunder Tiger did buy Ace and the two planes are the same but for coloring. The T.T.version comes in three color scheme's, great plane.

There is another one called the "Neptune" by Power-Line Hobbies.
This is a ARF built from lazor cut parts almost identical to the Seamaster.
Same tail, same wing float design but taller, same wing but uses two aileron servos, same pod, tank and cowl, fuse is built lighter but very nice. The main difference is that the Neptune is not amphibian.

I have one but haven't built it yet, still debugging my Seamaster twin.