Only if they were the only two ruby reference books ...which they clearly are not.
Personally I still really like the Pickaxe book, the latest (5th) edition of which covers Ractors, Fibre Scheduling and static typing. All things added to the latest versions of Ruby.
I also really love Jeremy Evans' "Polished Ruby" book which I think has some really great ideas for how to write ruby well.
Despite a lot of FUD Ruby in 2023 is better than ever.