The naming of these optics is quite confusing. Allow me to help:
Carclo makes 4 optics for this size quad emitter:
10621 - spot
10622 - narrow
10623 - wide
10624 - extra wide
Until recently, Hank would allow you to select two of them, the 10622 and the 10623. And if you didn’t specify he would use the 10622 automatically unless you selected Nichia E21A emitters which are known for mild tint shift and emitter artifacts, so he would use 10623 in an attempt to solve those problems.
Between the 10622 and 10623, it’s easy to ID which is which by looking at the optic—if clear, it is 10622 and if frosted 10623.
Recently, because of a rise of popularity of putting W1 emitters in KR4/D4V2 for the new dual channel drivers, Hank now uses the 10621 as well. These look very similar to the 10622 and are difficult to differentiate by looking at them. Both are clear. However if you use a ring light (as included in magnifiers) the ring reflections in each of the TIR optics is considerably smaller in the 10621 over the 10622. Hard to describe, but if you hold both in your hands and look at ring light reflections it becomes obvious.
To the best of my knowledge Hank has never carried 10624, but they are frosted like the 10623.
Now, to the last point and the reason I started replying in the first place, when you order a D4V2 or KR4, there is an option for buying an “extra floody optic.” This is poorly worded, but simply means Hank will ship your light with the optic it usually has (regularly a 10622) and include an additional 10623 in the box. An “extra” I.e. “additional” floody I.e 10623 optic. It’s really poorly worded and confuses almost everyone.
Truth be told, the best way for you to handle this is to make an order, then email contact@intl-outdoor.com and reference the order number and say “please use the 10623 optic” or whichever you want. That way you are sure to get the one you want and don’t have to purchase an additional optic.