What’s the difference between cards with the same specifications? Only packaging? Or marketing strategy?
The 64 GB version are both 90/40 MB/s and are visually indistiguishable too but numbers are different.
SanDisk Extreme microSD UHS-I Card
SanDisk Extreme microSD UHS-I Card for Action Cameras
Ultra and Ultra Plus (128 GB version) are both “Up to 80MB/s read speed; write speed lower”. Maybe difference is in the not officially declared writing speed? Or Ultra Plus is obsolete and will be updated with faster speed in the near future?