Are these two different phones listed in Google Drive's Backups? The following screenshot is from Google Drive's Backups.


SAMSUNG-SM-J327A backup

Apps: 30 apps
Call history: 94 KB - Last backup: Oct 13, 2019
Device settings: 4 KB - Last backup: Oct 14, 2019

Samsung SAMSUNG-SM-J327A backup

Apps: 32 apps
Call history: 101 KB - Last backup: Oct 13, 2019
Device settings: 4 KB - Last backup: Oct 13, 2019


They are listed as the same phone but one seems different with the number of apps.
How can I tell if these are two different phones?
You need to check whether there is another phone (in this case with the same model) that used the same account by going to Google Dashboard. From there select Android. The number of devices using the account will be shown and listed. 

If there are 2 Samsung SM-J327A models, to differentiate between them, you can go here to use Find my device and compare the IMEIs of both devices by clicking on the info button.