To practice or not to practice on more shallow mouthpiece

[Seymor B Fudd]

Hi again! I wrote a post about heavy practicing on cornet (+deeper mpc) then kinda losing higher register on trumpet (lead - shallow mpc) and got a lot of very thoughtful answers.
Since then (about 2 months now), I decided to do all my practicing on the shallow (Stork) mouthpiece.
And the result is: better range on both horns; I´ve acquired a certainty in my cornet playing like I never had (admittedly I practice a lot more than I ever did), in fact I´ve gotten a more "silky, soft" sound quality on the cornet, more core, more distinct rounder sound on the cornet, better attack, while at the same time my trumpetplaying has become more solid, slotting better etc. I found that practicing cornet the day before a concert is all that is needed. (and of course the transition to trumpet/shallow is affected - but not the other way around)
So now I wonder what´s going on with my chops? Why is this happening?
Ideas? Read somewhere that a more shallow mouthpiece is more demanding?!?
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Cornets:
Getzen Custom Series Schilke 143D3/ DW Ultra 1,5 C
Getzen 300 series
Yamaha YCRD2330II
Yamaha YCR6330II
Getzen Eterna Eb
Trumpets:
Yamaha 6335 RC Schilke 14B
King Super 20 Symphony DB (1970)
Selmer Eb/D trumpet (1974)

[brassmusician]

The shallow mouthpiece has helped you form a different embouchure which intrudes less into the deep cornet mouthpiece giving you better sound and control. The assumption that your endurance would suffer on the cornet didn't come true, maybe because you are practicing a lot more. Great that you have hit on a strategy that works - stick with it.
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Cannonball 789RL
Yamaha 635ST
Yamaha 16C4
Wick 2BFL

[Seymor B Fudd]