I've taken both courses too!
I found 2RU3 tougher than 2RC3, but they are both quite close in difficulty, which is to say the courses are fair when it comes to grading.
The textbook wasn't useful for 2RU3 at all. For 2RC3, definitely get the textbook. Dr. Peace pulls a lot of questions from the readings on the tests and exam. It was the difference between a mark in the 70s and doing well.
Both courses were enjoyable though. I like both professors!