For DM speaks the fact of three tournament victories in a row and that they had so far the best team work, best infantry, the best archer and the best cavalry combination. Hairless as IGL, leading in pick ups, DM matches, but also on the Draft Cup, is probably the most experienced and best commander there is right now.
For RM speaks obviously the fact of DragonKing, being the best cavalry probably around right now. One very gifted player has a lot of influence in 6v6. Infantry-wise I'd say RM is on par, for archery I'm the wrong one to judge, but I have to say that Koso is one of the best marksman this game has.
Mapwise: Omor is a ****show every time it's played imo, Spawnkills, ugly teamfights and projectiles and dangers lurking from every angle. Town Outskirts is rather balanced.
For Factions, well Sturgia should win imo on Omor.
RM got superior cav with relexan and dragon so I am positive they will win. However, ghazi and woj are both good cavs but I still do think RM cav is better. Cav is meta so the team with better cav wins. Let's not forget what happened last season when Inspire bamboozle RM before final