I have wanted to change a mouthpiece for a while but until now never had the proper expenses to do so. I have been playing on a faxx 4G because I wasn't able to afford anything else that would be a good enough jump. I'm preparing for Senior Region Band auditions next year and after my school gets their new euphonium I have to adjust a lot to two new items and want to minimize the effect of two at the same time. But I needed to change mouthpiece size and so I decided after reviews on here and from other great musicians I'd try Denis Wick. I decided to test a SM2U because I had already tested a SM3X before which is almost the same size as the 4G just a little bigger. So I tested a funnel cup SM2 and bowl cup SM2U and was amazed and confused. I loved the improvements of the medium-deep 4G to a deep cup SM2U. And also there was a more characteristic tone from my instrument, even though it was an intermediate level instrument. But what confused me so much was how even though I made the jump, I didn't feel anything different though I know the SM2U is bigger in cup diameter and had a slight difference in throat by .19 millimeters unless that is actually a significant jump. But I didn't feel any change in range, or have to toughen my embouchre like I did from 6-1/2AL to 4G. But then after that I realized how much Heritage is advocated, so I looked for the SM2U Heritage "counterpart" the 1AL. Sadly I have never tested this mouthpiece but am aware some people have played on a Heritage that are on this site. What do you guys believe, SM2U or Heritage 1AL? And I'm open to any other options from other brands of mouthpieces. I apologize for the long post but thank you for reading all of this.