What do you mean by that? Isn’t that the same?
This depends heavily on the bionic you try to remove; as you state, there are different difficulty levels for different bionics.
To my knowledge, it uses the same formula as for the installation (you can find it on the wiki) - or at least it used to.
Using that formula, you can calculate the necessary skills for the uninstallation of a given bionic.
There’s an older post of mine about the calculation on the different failure levels… It’s possible that things have changed by now, but assuming they didn’t, you want to stay below 29% “FAILURE CHANCE”, so you only take minimal damage if you fail to uninstall it.