There are two restored content mods for Kotor I.
Kotor 1 Restoration (K1R) which is the older, complete restored content mod that is both incompatible with K1CP and has its own game breaking bugs that haven't been fixed due to the team leader leaving the community after the 1.2 release almost a decade ago.
Restored Content for K1CP (RC-K1CP) is my own take on the restored content mod that is compatible with K1CP but it is incomplete. When I say it is incomplete, you'll read my "what's restored list" and see that there is clearly cut content that is missing from the K1R mod, however, my mod also has restored content K1R doesn't have and, even though my mod isn't done, the content that is already restored is, for all intents and purposes, finished.
Unlike Kotor II, the Kotor I cut content is content many see as being content that was actually meant to be cut unlike Kotor II which is a bug filled and clearly incomplete experience. Not using the restored content mod for Kotor I isn't going to hurt your game.