I love Google-Maps! Mostly because it's fun to view the satellite photos. But it doesn't really help much unless you're planning to live on the space station! :)
Century 21 Princeton Properties
I have grown up on in Suffolk County, Long Island lived in Southern Westchester almost a decade and now live on the North Shore of Long Island now. I would say that Westchester and Long Island have similar commute times for my husband who is an East Side commuter to go to work. It is really your choice.
Try to figure out your price range, real estate wants/needs and ideal commute time. Then look at LIRR schedules and Metro North schedules. I have lived in both locations and could email you some properties here on the North Shore and allow you to see what your choices would be here in Nassau County, Long Island.
One thing I can say is New York is a great place to live and Long Island truly has it all!
Century 21, Laffey Associates