The reason why the other recordings you like have a superior sound quality is because they were recorded on the OKeh label. The sound of OKeh records recorded after 1926 (electrically recorded) is generally spoken the best you can get from the 1920s. We are very lucky that some of the most important recordings with Bix were waxed on OKeh. We are also very lucky that the Louis Armstrong's Hot Five and Hot Seven records were also waxed on OKeh by the way.
Clementine was recorded on Victor. Victor isn't a bad label but the sound quality is not as good as on the OKeh label. Furthermore, not every cut on a label is as good as the others. There are better sounding Bix records on Victor than Clementine. Proud Of A Baby Like You is such an example. I have both records in superb condition but they don't have the same sound quality...
If you want to become a Bix fan I would suggest to buy the Bix Restored set as Albert told you. There, you'll find also rare alternate takes, which you can't find elsewhere. The sound quality is generally spoken very good. The Gennetts however (the very first recordings of Bix) are not as good as they could be. However, there is a brand new CD with the Gennetts. I don't have it yet but I'm pretty sure that the sound quality is better than on previous releases.
As to my channel... First of all, thank you Albert for the nice compliments... You'll find most of Bix's recordings (issued on phonograph records) there. Nevertheless, you should know that my recordings were compressed by youtube and don't have the sound quality of my original sound files.