Yes, its a MK3, it has also the 21degree sport stem (better for tall rider) and the new chain tensioner around the chainring.

I cannot see what type of disc brakes it has. Derailleur looks like a Shimano.

Do you have a more detailed picture, do you know how many speed on the cassette (or the list of components), is the frame polished aluminum ?

I also think that its a Pacific Cycle model. Most R&M models have more equipment (mudguards, lightning system, hydraulic disc brakes).