Seagate - FireCuda 540 2TB vs WD - Black SN850X 2TB

The FireCuda 540 2TB is the clear pick on raw spec strength, leading by 9.7 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.

Pick the FireCuda 540 2TB if you care most about endurance (tbw) and sequential write. The biggest gaps in its favor are endurance (tbw), sequential write, sequential read, among others.

The Black SN850X 2TB similarly doesn't carry a headline advantage on the popular specs — look at the full table for category-specific deltas.

Both ship with comparable capacity, so those specs don't separate the two — focus on the differences below.

Bottom line: the FireCuda 540 2TB is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.