I thought the RJ44 came with the cover. I was pricing same options and it was over $200 cheaper. So if it doesn't come with the cover it would be the same as a PR44. I may just wait to get the PR44.
In the grand scheme of things, is 200 bucks really relevant? I am going to be replacing my axles here very soon and priced out 3 different options. All axles are with an ARB air locker, DynaTrac Prosteer ball joints, chromo axle shafts and 5.13 gears. The Dynatrac PR44 came in at $4898 out the door. That is with the .50" thick tube walls. The Currie RJ44 came in at $4745 out the door, and has .375" thick tube walls. The difference between those 2 is irrelevant IMO, but with the Dynatrac you get more clearance than a D30 and thicker tubes.
The last option I priced out was the G2 Core 44, which came in at $4499.99. This axles has .250" thick tubes, so only a quarter inch thick, or half the thickness of the PR44. So, I had to ask myself is saving 400 bucks worth giving up more clearance and tubes that are twice as thick as the Core 44, plus Dynatracs no fault, no questions asked 1 year warranty. Again, in my opinion it's a no brainier. 400 bucks extra for all that is a bargain. Again, this is just my opinion based on the research I did, I'm pretty sure you'd be satisfied with any of them, but I want the absolute best in my price range on my rig.