Hi,
The difference between different revisions for Raspberry Pi toolchains is mainly the compatible SD card image.
This means that we resynchronize it on our side, verify that the all relevant tool and library versions are still the same (normally, only the gcc, libc, libgcc and libstdc++ versions are critical), run a few tests and release it. I.e. it will work out-of-the-box with the specified SD card image. It may also work with a slightly different image (e.g. no desktop included), but unless we explicitly list it as a “compatible image”, we have not verified it on our side.