KBDfans bought some Tealios from someone else than Zeal. Turns out those cheaper Tealios are fakes, and they sold them for like a year or so until Zeal noticed it. Some people said that those are better than the originals, and it seems like the manufacturer for the T1 were building them. But the switches were decent since no one discovered the fakes for a whole year.
Zeal only noticed it because KBDfans were selling more switches than they ordered from him, and based on some small differences in the housing of the switch.
There was no official statement about who made the Stealios, so take it with a grain of salt. But KDBfans stopped selling the T1s at the same time after they refunded all those that bought Zeal-switches in that timeframe. Pretty sure Wei cleared everything up with Zeal and Gateron and apologized publicly.
Point is, this drop looks exactly like the KBDfans tester, and KBDfans sold ("unknowingly") fake Zeal switches. Odds are that those testers have Stealios instead of the genuine Zeals.
Not sure if the Zealios were also fake, Zeal only confirmed the Tealios on reddit iirc.