Re: wanting to compare 2 books
Either one is a winner in my book.
"Exercises" will give you more than technical info...it's an incredible book.
"The Master Course" will give you more key info than you could ever imagine. Plus, in the introduction of "Dynamic Aikido" which is, I guess, the first edition, Kancho Shioda says to use the book as an instructor until one is available.
So there you have it, you can learn from a book. I think that's how I've learned most of my stuff...by solo-work.
What ever works for you.