Don’t be too sure 
For my FP2, I had a 128GB SanDisk Ultra Plus, and it didn’t work. Yet the 128GB SanDisk Ultra (not Plus) worked. Sometimes, there are little difference that can pose compatibility problems. See my topic here: 
SD card problem 
Problème de carte SD.
Although you are right and both will probably work without any problems, that’s why I think you can’t be 100% sure before testing.
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