The regular Galaxy Note 10 is the smallest of the two with a 6.3-inch screen with a 1080p resolution. The phone itself is smaller than the original Galaxy Note from 2011, which had a 5.3-inch screen.
Spec hawks will notice and be surprised by the Galaxy Note 10's 1080p resolution compared to the sharper resolution that Samsung typically gives its smartphone displays. It doesn't really matter much in reality, as I didn't even notice while I was holding the Note 10 in my hands.
The Galaxy Note 10 Plus has a massive 6.8-inch display with, indeed, a sharper 1440p resolution, making it the biggest screen on a Galaxy Note phone so far.
Spec-wise, there aren't any major surprises here. On both devices, you'll find the Qualcomm Snapdragon 855 chip that's turning the wheels in most of the premium flagship phones of 2019.
The Galaxy Note 10 Plus 5G is essentially the Galaxy Note 10 Plus, but with 5G connectivity.