I have noticed that even the same brand, style etc. may have
differences. A friend bought a Stubben Woton thru a catalogue based on
a saddle that fit at the store. She thought she would save $200. The
saddle arrived - same tree size, seat size, etc. but the stuffing must
have been a little different. She ended up sending it back, paid $50 in
shipping charges for both directions and bought the saddle at the store.