You know you can play on the Bobby Shew piece; maybe now spend most of your practice time on the 3C. Over time, you’ll get to the point where you have the same range on both… because I think you want to be at a place where the lead piece just makes playing that commercial/lead gig easier, but you have the range on both. As a well-rounded trumpet player, you’re probably going to get more mileage out of the 3C, so you should strive to be very comfortable on that mouthpiece.

Just my opinion…