Well, in a steel frame the 4516 no dash, 4516-1, 4516-2 and the scarce 4516-3 which isn't marked as a "-3".
The 4516-3 simply says "4516" above the trigger guard. The visual cue is the laser etched markings on the slide. On the box label, an "03" will appear on the right side of the label.
In an aluminum frame the CS45, early 4513TSW with the cut out grip frame, 7-round later 4513TSW with full grip frame, 457, 457 stainless and the Performance Center Shorty 45 - Shorty 45 MKII and 45 Recon.
The Performance Center pistols are all very nice variations of the 4513. A little scarce, and a little pricey too. But I notice that nice 4516's rarely go for less than $550 these days. Hope this helps! Regards 18DAI
Edited to add: There are also the DAO models. Hopefully KurtC will see your post and list those model numbers!