That's because the corps founder and director (George Lindstrom) was the former Kilties' director.
Most of the staff were former Kilties with several Scouts (John Schrack, Ken Geise, Greg Jaroze for a few) thrown in.
If you change the hats, the colors and a few details, MBBB was very Scout-like. Including marching style and being crowd-oriented. (If my memory is working, there were as many as 8, maybe more, Blues members who later marched Scouts. Not bad for a corps from the South that only completed 3 seasons.)