When I started reviewing my sample I noticed extremely good performance and wondered "what chips are these?". The flash chips have no markings on them that would make it possible to identify them, and every other review and the official wording say it's "TLC". So I dug a little bit deeper and found out that my sample actually uses 48-layer Samsung 3D MLC—like on the Samsung 850 Pro.
When I confronted Team Group with my discovery, my [marketing] contacts were just as surprised, but after checking with engineering, they confirmed my findings.
They explained that depending on flash chip supply levels, they're changing the product to use MLC flash—the original product spec remains TLC. They carefully compared performance and tuned the SSD so that there is no significant speed difference between both variants. They also mention that this is the better move than silently switching TLC with much slower QLC, which does happen in the industry, especially with less reputable SSD makers.