The Pro maps were made by Neil (CaptainMigraine).  These maps have lots of improvements including 
fixes for collisions, lighting improvements, weapon / powerup layout changes, and more.

For threads regarding these 2 maps, please visit:

https://forums.epicgames.com/threads/987546-DM-COMP-Kabal-Pro-(Improved-Layout-for-Gameplay)?p=31866926&viewfull=1#post31866926

https://forums.epicgames.com/threads/987547-DM-COMP-Deep-Pro-(Improved-Layout-amp-Lighting-for-Gameplay)?p=31866931&viewfull=1#post31866931

Thanks!
-Neil (CaptainMigraine)