topo3man

As you stated in the original post, both horns are made by Kanstul and since Kanstul has the original Benge tooling it boils down to the difference between Chicago Benges and Burbank Benges (the Kanstul Chicago and Burbank trumpets being virtual clones, respectively). The main difference between Chicagos and Burbank Benges was in the bore and bell. The Chicago horns only came in two bores, ML (.460) and L (.468) and Elden used the 3 bell on them (although there are some exceptions such as a few medium bore Chicagos out there). During the Burbank years, Benge expanded the selection of both bores (added MLP (.464)) and bells (2X, 4X, 5X, 6X). So there were many more variations of the Burbank horns. The only major difference between Kanstul horns and the original Benges is that Kanstul horns use a shorter stroke valve block. Original Benges had a fairly long valve stroke and many feel that the Kanstul block is an improvement over the original design. The difference between the Kanstul Chicago and Burbank 3* should be minimal since they should be homologous to one another as long as they are of identical bore.