This morning, SanDisk announced its newest line of microSDXC cards, the Extreme series. And they're Extreme[ly] fast. But as you and I know, manufacturer speed claims for microSD cards aren't exactly indicative of real-world performance figures (especially in smartphones), so we actually compared SanDisks's new Extreme cards to the older Ultra series. Here's what we found.
On Android, we used the A1 SD Bench app loaded on a Galaxy Note II to compare performance between a 64GB Extreme SDXC and an older (used) 64GB Ultra SDXC.