My two cents:
Support:
REVO: Great and Fast support
EVO: Surely the lack of support, in the last few years, is the biggest limitation for Evolution users, but for me I use it for 10 years, is not a problem.
Extras and System development:
REVO: Many extras available and a more info about the development roadmap
EVO: Another big problem is that most of recent and interesting extras for Evo, have not been discussed (sometimes published) on this forum, but there are many extras that compensate lacks between evolution and revolution.
You need to search them in github or in the Russian or Japanese community, same, if you want more infos about development.
Manager:
I really love the latest Revo manager, but I believe that is more appreciated by us developers, but less by customers.
Revolution manager has dramatically improved in recent versions and some new features are really useful and make my job much more enjoyable, but many of my customers still prefer the simplicity, speed and the ability to customize the Evolution manager.
My clients, rarely have high-speed connections, but they always have a very little patience for "page loading" and even less ability to appreciate certain advanced features
Features:
REVO: Revo it's a Modern and Powerful cms/cmf: you can manage multiple sites with a single CMS, keep safe the manager out of the public folder, custom codings with custom-tables, lexicon and more.
EVO: Although lacking of the most advanced Revo features, Evolution is still able to satisfy all the characteristics required for the development of a website, which is big, small, multilingual, ecommerce or other. Often with less server resources and more speed.
Security:
REVO: Revolution is the most secure CMS that I know.
EVO: It is not as Revolution, there's no doubt, but the major security issue there were in the period of abandonment of its development. Currently there are no known issues
My Conclusions:
Evo is still a great software, perhaps a little less powerful, but it has its advantages.