I have both guns. The FL3 that I have is with all of the nozzles and with the aluminum cup. While it does a credible job, I do like the Sharpe Finex better.
The FL3 is Chinese made, and supposedly no full rebuild kits available. I'm not sure I believe that, but time will tell whether DeVillbiss will support this gun
The Sharpe is supposedly US made and there is good support. It does a much nicer job for me then the FL3 and for less money.
If you are considering a budget gun, why not consider an Astro - most painters seem to like this one over either the FL3 or the Finex though I do not have first hand knowledge.
I'll eventually sell the Finex as I just blew a big part of the pension check for an Iwata LPH400. The FL3 with all the nozzles will be kept for a primer gun.