I own a pair of the suede Altons (C&J Handgrades on the 337 last, *not* made in Italy) and a pair of the Gherardos, though not in suede. There are some practical considerations to keep in mind when deciding between the two shoes. First, the 337 last is elongated and I went down 1/2 size from my normal US sizing (I bought US 11.5D instead of my normal US 12D). Second, the Tramezzas are available in a wide width, whereas the Altons are standard D width and may be too narrow. I have a narrow foot and my Altons are snug, though not uncomfortable (and it's true that the 1/2 size shorter than usual also makes them narrower than usual). Third, recognize that if the auction has "GVH" in the title, the auction is from the online "outlet store" for Grapevinehill and sells seconds. This may not be important to you and may not be the case for the shoes you're considering, but you need to be aware. Finally, realize that despite the pictures, both shoes are very similar in color, a chocolate brown. I looked at the suede Gherardos when I was wearing my Altons and couldn't distinguish any difference in the colors, though I didn't place them side-by-side.
Now for my personal stylistic preferences. I like both shoes and enjoy wearing them. I wear odd jackets/trousers more frequently than I wear suits, yet I get more use from the Gherardos. I find the sleek last of the Altons an unusual combination with the suede, blucher, wingtip styling. IMO, the styling would be more consistent with a wider last such as the 325 last used for Polo's Darlton wingtips, which I also own (and wear more than either my Altons or Gherardos).
I don't think you can go wrong with either shoe and I believe the construction quality is comparable. If I were you, though, I would try to find a local store that carries one or both shoes to try them on before buying. The fit considerations, especially width in your case, should be paramount.