Kingston NV2 is in that "what you get may differ" category, and Kingston explicitly says that what you get may change. I have two NV2s with differing die count, for example. Their controller might be different too. They're external, short-use drives, so I don't care.
So, returning to previously mentioned ones, from their respective datasheets:
I bought up a lot of 960 and 970 Pro models when the 980 came out and it was TLC, to have MLC drives for logs and caches. Little did I know that TLC was just the beginning of the decline and QLC was right around the corner for even enterprise!
If it's left ambiguous then it's either QLC, or a lottery where the "same" model may be TLC or QLC.