Ortega takes every single advantage away from Max he had so far over his opponents.Size and reach for sure.
Max breaks his opponents down systematically, frustrates them,but Ortega is the calmest fighter ever stepped into the octagon.Max can't count on his ground game (that would be suicidal),can't risk kicks that much (he doesn't want Brian to catch his legs and score a take down) can't clinch up with him (see what happened to Swanson),so the only weapon he can use is boxing,meanwhile Ortega will have his full arsenal.
Yeah,I'm going with Ortega by sub.
(If I sound like someone biased,I might be...but let me know if you see it otherwise)