There are 2 refurbed versions of the 747 now in the fleet. The super hi J version are all done and flying. These consist of 80+ Club world (CW) Seats and premium is rows 33-36 on seat maps to identify correctly on seat maps.

Then there is the Mid-J refurb which is on-going. This version consists of 52 seats in CW. This is slightly different in that some are getting different refurbs due to imminent retirement. More on this in this thread...

Mid-J 747 Cabin Refresh

So Mid-J and Super hi-J. I’m not sure what DXB is getting at the moment. Others will know I’m sure.