RAW VS CRAW?

As a photographer selling photos to clients should I be using raw over craw? I know the file size is smaller hints the name (compressed raw) but how much info am I actually losing? I know the difference between jpeg and raw is huge but every sense I've gotten my first mirrorless camera I've been shooting Craw and never really thought about it. But now I've started to think on it more. I use two 128gb lexar V60 cards. Is it worth the extra storage and should I just shoot raw?