Yep. They also provide the DH-16AFSH, which is a slower iHAS124 F, for OEMs. Much like there was a DH-8B2SH, which was a detuned iHBS112. Same hardware, slightly different products.
Reach back far enough, you'll see a few other 16x drives that were speed-reduced versions of 18x, 20x, 22x, or 24x models.
And there was also the minor differentiation way back with drives like the SOHW-1213S/1613S/1633S/1653S; though those models were more or less released sequentially to keep up with the spec wars, you could also find some of them on the market concurrently, when all could ultimately have been a 1653S.