Happens some times.
Even if they are the same brand, same size, same class and have the same package, the two cards could be made in different batches, from different factories and even from different countries.
Cards from China/Taiwan tend to be of lower quality and have slower speeds than those made in Japan and Korea.
twiztidsinz said:
QUOTE(the mario @ Feb 26 2011, 10:37 PM) I've noticed this with all my Pokemon roms on a 4gig SanDisk SDHC card; had no previous problems with the 2gig model.
2GB would be a standard Secure Digital card, the 4GB is a SD High Capacity.
The SDHCs are
typically but not always slower than the standard SD cards, just as SDXC will
most likely but not always be slower than the SDHC and SD cards.
In most devices, the difference in speed isn't noticeable, Digital cameras only need to write one image at a time and
uncompressed video is about 30Mbit/s or 3.75MB/s, so a Class 4 with 4MB/s write speed would be sufficient for almost everything in that aspect.
Those devices typically have more of a need for write speed than read speed, where as the DS makes use of Read and Random Access times more so than a write speed which is used primarily for saving -- and a Class 4 is said to save Pokemon/WarioWare faster than a retail cart.
