To choose between the Kingston KC3000 and the Western Digital Black SN850X, here are a few key points to consider:

- Transfer speed: The Kingston KC3000 offers faster sequential write speeds of up to 7000 MB/s, while the Black SN850X achieves 6600 MB/s.
- Durability: The Kingston KC3000 generally has better durability in terms of TBW (Total Bytes Written), meaning it can withstand more write cycles before starting to show signs of degradation.
- Random performance: Both SSDs offer similar random read performance, but the Kingston KC3000 may have a slight advantage in random writes.

In summary, if you're looking for write speed and durability, the Kingston KC3000 may be a better option. If you're looking for excellent sequential read and value for money, the Black SN850X remains an excellent alternative.