Who wins? Munguia is big, tall, and a pressure fighter. Munguia also has more than twice as many fights as Janibek. Granted, they were against less than stellar opponents, but he still has more experience than Janibek.
Janibek has loads more elite amateur experience which also counts for a lot so the experience difference is negligible.
Imagine this fight actually happens? I see Janibek leading going into the 12th then Munguia puts him on the canvas, bek gets up and Munguia jumps on him and gets the stoppage ala Chavez Jr-Martinez, but this time gets the job done.