My kit, which was delivered 4 weeks ago (production week 40), is the dual rank model with 8Gbit Micron E-Die.
Which one you get in the end (M16FE1 or M8FB1) depends on Crucial, Digitec has no influence on it.

Unfortunately I just picked it up, I got the single version. I'll probably send it back and get another manufacturer. It's a pity the manufacturer doesn't make clear models here. Unfortunately, you can only see it when it is unpacked and you can see the exact model.

all right, thanks for the answers, i will order and if it does end up being the single rank kit, there is always the right of return.

My kit is also the Dual Rank Kit.