Thanks for your input Jean, indeed, the base has more rounded edges, because it seemed to me a safer shape.
The only differences between them are the edges of the base (apart from the motifs engraved on them) and the adjustment of the grooves to achieve a more solid assembly.
Each of them is varnished by hand, so there may be differences due to this as well. By the way, after having carried out these tests, which in principle have all been to make them in acrylic, it has caused me interest and it is possible that I will try to make a more "traditional" Kake.
Thanks for your messages