It seems really better than OM.
First of all OM got A HELL LOT of hate because of kayak ads, but devs refused to remove it. Even after f-droid team put anti-feature. (This thread look at it: Organic Maps adding KAYAK referral links to mobile app )
Secondly, OM lied about open source (there was server and map builder drama).
Thirdly, they had argument with F-droid team and threatened to leave F-droid (i have even screenshots somewhere) which is plain unacceptable.
And finally, CoMaps has better interface, has customization (like hiding annoying info button in bottom left corner) etc. And now even working on adding ability to change CDN server to custom.
Thank you, @CoMaps !