SanDisk - Extreme PRO 2TB (Portable) vs Seagate - FireCuda 540 2TB

The FireCuda 540 2TB is the clear pick on raw spec strength, leading by 26.6 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 Extreme PRO 2TB (Portable) if you care most about interface. The biggest gaps in its favor are interface.

Pick the FireCuda 540 2TB if you care most about sequential read and sequential write. Its strongest claims are sequential read, sequential write.

Both ship with comparable capacity, endurance (tbw), 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.