If I import images to LR Classic and choose a synced collection in the import dialog, then those unedited images show Adobe Standard as profile in LR CC (desktop and mobile on iPhone and iPad). In LR Classic it looks like they have Adobe Color applied. The profile in LR CC changes, if I do some edits like auto tone in LR Classic.
Adobe Standard is set as profile in LR CC as well, if I reset all edits of a synced image in the develop module of LR Classic. LR Classic still shows Adobe Color in the profile menu, but in LR CC it is Adobe Standard.
Since I thought it might be related to a previous issue of mine, I tested four RAW files from three different cameras: Olympus OMD E-M1 MkII, Pentax K-x (native PEF and out of camera DNG) and Hasselblad X1D. I can reproduce this with all files.