Are you going to be doing a lot of write activity? Do you need sustained write performance? If this is mainly just right once and store with infrequent new writes. Your choice doesn't matter much. They'll all be fine.
In general this is the hierarchy
(Samsung X5 > Sandisk Extreme Pro > Samsung T7 > Sandisk Extreme)
In this review you can see how the above models compare to each other. There'll be some variances based on capacity. Larger capacity of the same model are generally a little faster than their lower capacity counterparts. Although 4TB models are sometimes a little slower than 2TB.
Samsung’s T7 brings colorful and speedy storage to the masses.
www.tomshardware.com
I'd also consider just buying a USB 3.1 Gen 2 NVMe enclosure. Then picking your own SSD. My preference being the 970 Evo.
Warning: Any review you find may not be current. SSD manufacturers often change to slower parts after the reviews come out. This has been made worse from the supply constraints of the pandemic.
Even Samsung had to do this in some models. Even though they make the parts. This is the first time they've done this. At least they used alternative good parts of their revised models. Still it affected performance metrics. But they actually announced it and I believe adjusted the SKUs to reflect the change.
Still Samsung is the brand I trust most. Not to monkey around with their models in secret. To cut costs after reviews. Then say it still technically meets the advertised specs.
