I understood that the SD card CLASS system was an industry standard for minimum read / write speed, so I don't understand how a class 6 is faster than a class 10!
Class 6 cards have a guaranteed minimum speed of 6Mb/s
Class 10 cards have a guaranteed minimum of 10Mb/s
A manufacturer can make a card that has a speed of 16Mb/s for example and then correctly describe the card as a class 6 while another can make a card that is 11Mb/s and correctly describe it as a class 10 card. This is why some class 6 cards are faster than some class 10 cards .......