Intel Optane Series 900P (2017) vs Samsung 860 Pro Series SSDs
Intel Optane SSD 900P U.2 280GB
Both options make for good, if unremarkable, Internal SSDs at the $370 budget range. While they should serve reasonably well, you might want to look into some other options at that price point.
If you're still interested in learning more about the Intel Optane SSD 900P U.2 280GB and Samsung SSD 860 Pro 1TB, however, we wrote-up what we know about them:
The Intel Optane SSD 900P U.2 280GB was well-received by reviewers at Tom's Hardware, a trustworthy source that performs unbiased hands-on testing. It did great in their "Best SSDs 2020: From Budget SATA to Blazing-Fast NVMe" roundup - they named it their "Best Low-Capacity Add-in-Card SSD", which, by itself, suggests that it's a noteworthy product.
Moving on to the Samsung SSD 860 Pro 1TB: it was loved by reviewers at Tom's Hardware and Techradar - two reliable sources that conduct objective in-depth testing. In fact, it was their "Best Prosumer SATA SSD" and "The best SATA SSD is cheaper than you think", respectively, pointing towards it being a Internal SSD worth considering.
We also performed a thorough Intel Optane SSD 900P U.2 280GB vs. Samsung SSD 860 Pro 1TB review score analysis - it turns out that all of the sources that have tested both Internal SSDs, including PCWorld and PCmag, preferred the Intel Optane SSD 900P U.2 280GB over the Samsung SSD 860 Pro 1TB.
Out of all the sources that reviewed them, the Intel Optane SSD 900P U.2 280GB turned out to be most loved by PC Gamer, which gave it a score of 9.2, whereas the Samsung SSD 860 Pro 1TB got its highest, 9, rating from reviewers at Techradar.
Lastly, we compared their review averages and found that the Intel Optane SSD 900P U.2 280GB did much better than the majority of its competitors, with an average review score of 8.6 out of 10, compared to the 7.8 overall average of Internal SSDs in general, whereas the Samsung SSD 860 Pro 1TB hasn't managed to perform quite as well, with an average rating of 7.8.