You've essentially answered your own question. Your system is, I gather, running perfectly normally. On the vast majority of checks the core temperatures vary from one another and in a fairly consistent way.
This, in and of itself, defines "typical"/"normal" for your system.
A great deal of this depends on how tasks get spread among the cores, and it's not unusual for a specific core to be first choice, another to be second, etc.
Brian AKA Bri the Tech Guy (website in my user profile) - Windows 10 Home, 64-Bit, Version 1803, Build 17134
Memory is a crazy woman that hoards rags and throws away food.
~ Austin O'Malley