Is there a difference in these 2 sd cards?

[rcyphermd]

I have a Sandisk ultra 32 g Class 10, and a Sandisk ultra 32 g that has a "U" shape with a 1 in it. What is the difference between these? Thanks!

 

[EarlyMon]

https://www.sdcard.org/consumers/speed/

For use in a cell phone, they're pretty much equivalent - provided that the UHS-1 isn't strictly UHS-1 and decides to not work. I haven't experienced that personally but it's been known to happen.

Many are also double rated and marked C10 and U1.