Random Read Performance
Both the MX500 and Vulcan use the same number of Micron 64L 256Gbit 64L die. The MX500 splits the die among eight packages, but the Vulcan uses just two packages to reach the same 500GB capacity. The Vulcan loses some penalization used to increase read and write performance.
You can see how that works in the random read performance chart. The bar chart shows both drives surpass 10,000 read IOPS at QD1 and that's a good thing. You will love how fast your computer feels with latency this low. When you move over to queue depth 4, the numbers look quite a bit different. The MX500 delivers nearly 40,000 IOPS, and the Vulcan musters just 33,500.
Most users will rarely reach high queue depths, and even QD4 will only happen in tiny bursts. This shows the difference between a drive completely optimized for performance, and one optimized for a lower price point.
Random Write Performance
The random write test shows the exact same scenario with the MX500 performing slightly better at higher queue depths and the Vulcan meeting the MX500 at low queue depths.