I just bought a PNY Micro SD/HC card but just found out I've already got a Transcend one in my phone that I wont be needing soon. The only difference I can see is the Transcend has a 6 on it (It was bought last year) while the PNY has a 4. They are both 4gb and I'm thinking of sending the PNY back as I don't need 2 cards. I would have thought the PNY would be better as its newer but not sure what the numbers 4 and 6 mean.
Can anybody help please?