Does anyone know of a list of textual differences for all of tanach or at least the chumash between the Aleppo Codex (Keter Aram Soba/Tzova) and the more common text? I already have such a list for Megillas Esther. Nikkud and Ta'amim are not necessary. A link to a plain-text or html version of the more common Torah text would also be useful. Since Mechon Mamre already has the Keter (Breuer) online I could make the comparison myself.
You should look in the front of each volume of the common Daat Mikra series on Tanach (the pink volumes from Mosad HaRav Kook). At the end of their introduction to the book at hand just before the text starts, they bring Rav Breuer's listing of all the textual variants (including trop and nikkud, but not parsha breaks) between the major manuscripts available (including Aleppo, Leningrad, Sason, Cairo, the Venice printing, Minchat Shai and various other Mesorot and collections of Ben Naftali and Ben Asher), as well as which one he chose in writing his version of Tanach which is used in that set.
If you can't find a print copy, the entire set is available online through Otzar HaChochma. Unfortunately it is subscription only, but the first 40 pages of each book are free. So here is a link to Daat Mikra on Bamidbar, where the introduction is short enough that you can see the textual variants listed starting on page 31 through the end of the free part.