Some sellers don't know what they are listing.
Some are expander, and some are the 6x 8087, I have versions of both and I even have expander versions that have redundant (2) expanders. I believe when you see the #2 in the part# IE: 216EL2 that "2" at the end = 2 expanders but I may be wrong and that may mean SAS2, I'm sure there's some magic decoder out there
I'm not 100% on how they list the non-expander versions, I have some I can check but If I recall they just say CSE-216 on the side/sticker.
EDIT: Just checked the part#/sticker on the side just says CSE-216 -- There may be another someplace but I haven't seen it.