In my case, my range, endurance does not change once acclimated. This is not voodoo or Monette specific but unfortunately too few players and teachers invest enough here. Read Dave Monettes testimonials from players after getting their bodies aligned. The last issue is the state of our playing. Our generation grew up on starting with ML instruments and a 7C and then maturing to a larger horn and specialty mouthpiece. Take your favorite horn into a bathroom and play your favorite excerpt, then go outdoors to a lake and play with no acoustical feedback - the same horn us now stuffy and much harder to play. The fourth issue is our ability to hear ourselves. Matching a section sound in a wind band is a very much different use case than manipulating orchestral fabric as a symphonic player. The third issue is where will we be playing. Remember, the trumpet is a complete system including the player. The second issue is match of the mouthpiece to the different bore progression and bell shape. The brain is actually in the way of change. We are most comfortable with the stuff that we are used to because more is automated. The first issue for comparison is acclimation.

This is a considerably different question. So, if I buy a medium-bore and a large-bore from Kanstul, I would not find the large-bore harder on my endurance and other perimeters at the end of a night's gig? They would have the same result?

Said in Does a large bore horn take more air?:

Olds ambassador cornet bore