Question about Kingston Canvas Select Plus

I believe that the C't Tester and CrystalDiskMark are sufficiently accurate. The data volumes are too large for a cache. I think it's more likely that there are fluctuations within the batches on the part of the manufacturer. But such deviations are quite glaring.
With Samsung EVO+, which is specified at 130/130, it was 80/35. Sh*** game.

It amazes me that you reach such "high" values. Are you sure there is no cache in between? I use the cards in my Raspberry and the speed doesn't convince me at all. Measured 11mb/s read and 10mb/s write. The Sandisk cards are much faster. When I use the notebook to write to a card with the IMG file, it does about 4-7mb/s, but always breaks down briefly. The Kingston is cheap and works, but I'll probably go back to Sandisk anyway ;-)