The Crucial T700 2TB is the objective winner of this comparison, securing more total spec victories than its competitor. Its most significant advantage is a 71% improvement in sequential write performance, which provides a substantial edge for data-intensive tasks. While the Samsung 990 Pro 4TB with Heatsink falls behind in the majority of technical categories, it maintains a distinct lead in storage volume, offering 100% more capacity than the alternative.

Users who prioritize raw write speeds for professional workflows or high-performance computing should choose the Crucial T700 2TB. Conversely, the Samsung 990 Pro 4TB with Heatsink is the superior selection for individuals who require maximum storage space for large libraries of files, games, or media. Selecting between these two drives depends entirely on whether your primary requirement is the faster sequential write capability or the doubled capacity provided by the larger drive.