I believe it was Schilke that said that about 85% of most horn players. Will sound the over all best sound wise, on Yellow Brass. I feel that Rowuk has the better over all answer. These examples can be shown out in the advertisements of the various Pro King Trumpet models over time.
Example is the King Super-20 and the King Symphonic DB models. This applies to the two King KMI Pro Silver Flair/Golden Flair models and last Pro King KMI 2000 Flair series models.
First note is the Tempering of metal,the bore sizes,lead pipe materials, Bell tapers, Bell Flairs. Brighter playing Super-20's had the 4/34 inch bell and the Symphony models had the 4 7/8 inch Bell with Dual bores.
You can also note that Leblanc, Conn, and Besson made 5 inch larger throated Bell horns. Couple that with a .468 to .485 bore size. The Horn would probably play darker and broader in sound.
One of our T.M. or T.H. members has a good article on the sound concept of our various type Horns today. Due to the influence of the French and German Music Composers of the 19th Century into the 20th Century. Seems the French Composers preferred Bright playing type Trumpets and the German Composers preferred a Hybrid type Trumpet/Cornet,darker sounding Horn.
When Reynolds created the Reynolds Argenta line of Trumpet/Cornets. Going with 100% Nickel Silver,may was trying to combine the best of both sound concepts. They can play dark in the mid/low range and very bright up high with plenty of DB output.
Good luck on your horn choices. When I hear a dedicated Semi to Pro player, playing any of the vintage models or newer models. All sound good to me.