** UPDATE **
I made other tests with the game Will Rock (SD 2.90.040) : results are a bit strange.
When mounted on a virtual drive, the converted image works.
Then I burnt it on a Ritek CD-R, using an old Phillips 4x burner (1 sheep) and Alcohol 22.214.171.1242, using safedisc profile.
First, there were not errors at the beginning of the CD, as expected : CDMage recontructs ECC/EDC fields during the conversion, but it is not a problem because Safedisc doesnt seem to check the errors anymore since safedisc 1. (Anyway, it worked from the virtual drive).
When run from an Administrator account, the game crashes, like when it detects a copy (however, the error code is different)
When run from a limited account, the game runs fine everywhere.
So I guess something was lost during the conversion, something that can only be accessed by administrators. It could be the pregap area, or maybe SD now reads the weak sectors in RAW mode to prevent "Amplify weak sectors" and other means of emulation. (Does windows API allow reading sectors in raw mode in a limited user account ?) Or maybe it is something else ... Anyway, further tests shoud be made.