Scotty cameron 1.5, 2 or 2.5?

Any thoughts on what differentiates these three models?

Thanks

Lurve my 1.5!!!!!!!
They all have different neck/style configurations.

One of the main reasons i went for the 1.5 Studio Select was the neck style was the same as previous putters and i'd tried one of course.
 
The differences vary slightly between models, but essentially .5 models have a flow neck (half shaft offset), and non .5 models a plumbers neck (full shaft offset). In the Newport, the Newport 2 is more squared off than the Newport.
 
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