What is the difference in these 4GB SD Cards?

[swj123]

Newegg.com - Transcend 4GB Secure Digital (SD) Flash Card Model TS4GSD150 - Flash Memory
$39

Newegg.com - Transcend 4GB Secure Digital (SD) Flash Card Model TS4GSDC - Flash Memory
$15

I am going to get one for my X51. Is it all about speed?

[Julie]

The $39 SD card is 150x, so it will be faster. Pocket PCs don't usually capitalize on the speed of faster cards, so go with the cheaper card, unless you plan to use the card in a camera (which will use the faster speed).

[carbonyle]

Long ago i paid "many" money for a 500mo SD card which has "up to 20mb/s data transfert": I'was useless for my axim but it's faster to transfert files on it... yesterday i pad 1/4 of the price of my old card and now i've a 4gb sdhc... Anyway my "standard" sd is still useful: SD bootloader doesn't support SDHC (and i flash a lot my x51v!)

So i depend what you needs, faster transfert or only for your ppc
the question is did you have a SD card reader if not look for one they're cheap and SO usefull!