No you're right.
You can see some information about what the changes were (new photos, profile updates etc) but not the exact change made.
But it all paints a picture. Search UKP with the AW profile no, does it show any results with a different name or photo. If yes, then check in my.adultwork. Insert the AW number to fill in the blank.
External Link/Members Only If there are a lot of recent changes, taken with the pointer from the phone number, it points to a profile being passed on.
On the other hand no updates at all is probably a dead profile or a PG farmer.
I think it also helps if you hot list profiles in AW and track them over a few weeks to see how they perform. I note down the profile name and phone number at the point I hot list them so I can track changes more easily.
It doesn't help with the other kinds of scams in person like being short timed or no shows but it does whittle down the list of profiles to decide from.