Any side-by-side comparison between them?
Not many reviews on Classe monos since they were introduced around Pandemic start.
Local dealer has a open box Classe hence was tempted 
PS: Temptation is root of all evil 
Do you mean Classe?
Yes sorry for typo
What is your system comprised of, especially important, what speakers. What are your motivating goals regarding the change?
I use krell chorus 7 channel amp.
It drives my revel be speakers in listening room.
I’m reading that monos provide better isolation and hence will improve SQ significantly.
Price dependent, but I’d give them a trial if the dealer is up for it. Speaker cable selection is going to be important from what I remember of the Revel Be series. The Revel 228Be were on my short list for a time, displaced by the Revel Ulima Studio2. Eventually I went in an entirely different direction. For the Ultimas I was leaning to Ayre or Pass. I’d like to think the Classe Delta Monoblocks would be a good pairing, just not with Nordost cables based on what I heard.