I own both....actually 2 of each. But I either use the 1.5mm Needle Head from the older original model Control Spray on both the more powerful Wagner units, or switch to the Graco 2900 / 3200 head so I can use the 1.5 mm / 1.0 mm Needles that unit can handle.
I created a Hybrid of both ( Wagner Max + Graco 2900 Head ) because I do Screens almost constantly, and having lots of "ooomph" behind a finer spray means a smoother finish done much faster.
As such, these days I really do not suggest the above referenced Wag's for NOOBS, because they do not have the availability of a smaller needle. Wagner does make a new Unit that offers both type Heads, but it's not priced economically enough to warrant telling cheapskate DIY'ers to make such an investment.
So I still stick to the Graco 2900
With this needle Kit:
......and this Mixing Tool:
.....and Nylon "Sock" Strainers similar to the one shown below (Home Depot / Lowes:
Spray painting is almost mandatory when paint is going onto BOC. Rolling requires that either the BOC be stretched "Drum-Head" tight, or a solid backing be provided. Now lots of people have done such....but results vary wildly, whereas spraying will almost always provide excellent end results.
I just located this older Wagner Control spray w/1.5 mm needle. Combined with the Control Spray Max, it can do a great job.