Also, I realise I probably didn’t answer the question about bore sizes and ease of playing but that is such a personal thing it almost can’t be answered. Smaller bore horns are more efficient if you can play them (correctly) and if the sound matches what you want but in the big picture, the grand scale of trumpet playing this is such a small factor.

To put some numbers onto it to attempt to illustrate a point;

Factors of trumpet playing is made up of:
The players sound concept and technique – 90%
The mouthpiece – 8%
The horn 2%

I’m sure many will disagree with my numbers, that’s fine, they really don’t matter, the point I’m trying to make is where to put your focus and keep in mind the big picture.

Just move some air through a metal pipe and make some good sounds that make you and the people around you hearing them, happy. I’ll leave it there because its getting late and I’m rambling.
Hope you found some value in this.
From Alistair