It's that their level 3 support ?
After reviewing the data provided from IOPing, there seems to be some very high CCTs (>2 seconds). While IOPing can measure CCTs, we don’t use this benchmark as we focus more on more prevalent benchmarks such as PCMark, CDM, HDTune, IOMeter, etc.
For PCMark Vantage, the current model is ~5% higher in overall storage score. The subset score for gaming is ~10% higher than the earlier model. IOMeter testing through various queue depths and block sizes from 4K to 128K shows a significant increase in throughput in sequential writes and reads of >90MiB/s. Random Read IO/s increased from ~5-10% throughout the various queue depths as well and Random Writes showed much more than this. With the previously mentioned high CCTs, this could be indicative of either a suspect HDD, Host configuration and/or overhead, or other. In short, all validation testing shows that the current Black model meets or exceeds all design criteria for performance with noticeable improvements over previous generations. Again, we always appreciate seeing the test methodologies and results from end users for comparison to our own, in this instance, we don’t see any issue in HDD capabilities.