In school I learned Rhino in a beginning 3d modeling class and moved on to solid works in the advanced class.
That being said, if you have access to solidworks, I suggest spending a little bit of time to get familiar with it.
It has a different approach then Rhino but uses many of the same principles. Put simply, your knowledge or rhino will make it pretty painless to learn solid works quickly.
I tend to use solid works more because I can create a general outline of a design then dial in the details pretty easily and efficiently. The things I make in solid works tend to look a little more professional than the the things I model in rhino. Solidworks is especially effective when designing that you plan to create in real life because it is grounded in many of the manufacturing processes.
The most important thing to remember with all 3d modeling programs: Youtube, Lynda.com and Keyshot are always your best friends!