My first Longboard - Cortez or NSP? Please help!

Hi there
I'm a 5ft 8, 60kg girl, who's still very much a beginner but knows she wants to be a longboarder! I've gone from riding a 9ft foamie to and 8ft foamie and I've recently had a go on an 8ft NSP board. I'm thinking of buying a 9ft 2 Cortez or a 9ft 2 NSP, but as a beginner can't work out what the difference is! What do you think would be better for me? Also is a 9ft 2 about the right size for me? I'm going to be surfing mainly on the south coast of the UK.
Any help would be gratefully recieved!
I'm a 5ft 8, 60kg girl, who's still very much a beginner but knows she wants to be a longboarder! I've gone from riding a 9ft foamie to and 8ft foamie and I've recently had a go on an 8ft NSP board. I'm thinking of buying a 9ft 2 Cortez or a 9ft 2 NSP, but as a beginner can't work out what the difference is! What do you think would be better for me? Also is a 9ft 2 about the right size for me? I'm going to be surfing mainly on the south coast of the UK.
Any help would be gratefully recieved!