| Technically, cable is faster rated at 30mb a second to DSL's 6mb a second, but in the real world neither is realistic. Neither DSL or Cable is better all the time under all conditions.
Bandwidth:
Basic DSL is generally 128kbps upstream and down downstream.
Cable is generally 500-700kbps downstream and 128kbps upstream.
Downstream = the speed at which you receive data FROM the Internet.
Upstream = the speed as which you send data TO the Internet.
Shared vs Not Shared:
DSL does not share it's bandwidth with your neighbors cable does. This doesn't necessarily mean DSL will be faster because DSL's bandwidth also is limited by your distance from the ISP, cable is not. Also, if the cable provider has good bandwidth sharing your connection will make little to no difference.
Secure:
DSL is thought to be more secure than cable because it doesn't share with your neighbors, plus most DSL is a on-demand connection. Meaning it's not always connected to the Internet like cable.
In the end it all boils down to your location and whats available to you.<!-- / message --><!-- sig -->
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