I don’t know how much CaDA influences the design. But the approach is quite different to Lego. If Lego builds the chassis, then adds on top, in a horizontal manner, CaDA builds vertical slices: engine, cabin, transmission, and then joins it all together.
The way pieces are grouped is also totally different. As I mentioned, you have 7 different parts you need to build, but for each part there are multiple bags that seem to be grouped by the type of the piece, not where it fits. So you have gears in one bag, pins or axels in another, and so on. I spent a lot of time just sorting those into finer groups.
CaDA also uses some pieces I’ve not seen from Lego. Notably the strange angled pieces. Lego angle is the same thickness. CaDA has thickness 2 going to thickness 1.
Because the bags are just types of pieces and there are just 7 major blocks to build, you have to manage your own time. Unlike with Lego, where I knew 1 bag = 1 hours, give or take. It’s much more difficult. I spent 2:30 hours in 2 sittings, and haven’t finished the 1st block. Got stuck for a long time on this piece called 7-9L Linear Actuator because it just wouldn’t fit. Turns out, it has a screw inside, so you can adjust the length, and I put it in without adjusting,