Memory Stick Pro

Memory Stick Pro
Is there any difference between the Memory Stick Duo, Memory Stick Pro Duo?

I have a Sony Ericsson walkman / camera phone (I'm not sure exact model) but has a 128MB memory card attached duo, and I wondered if Stick Duo Pro memory was more or less the same thing? Will the ms pro duo on my phone?

The only difference I know is "duet" of more than 128 cards are called "pro duo". I do not know if the phone Duo can handle cards larger than 128 MB, but if I had to guess I imagine so. You can always ask at Ericsson: http://www.ericsson.com/ericsson/contact/index.shtml

Sony Memory Stick Pro Duo 16GB