In answer to your questions, sorta, and yes. They are both low wing, 40-60 size, second plane type planes, but the construction and overall setup is somewhat different. The 4* uses light ply frames, and stick type turtledeck, comes out of the kit as a taildragger, and has solid(unless you re-engineer ) tailfeathers. The tigger uses conventional ply/balsa fuse, has a slightly different shape to everything, the cross section is basically rectangular, and comes as a trike gear setup(also subject to re-engineering). Neither of mine have flown yet, but both are now on my workbench. 4*40 is about half done, the tigger was started about a year ago, but never finished due to time and travel to not so wonderful parts of the world. I have however flown both(other people's), and really like the performance of both, I think the 4* does better at slow speed, and the tiger 2 seemed to be "smoother", but that might just be me.