I have a yellow Oliso that I bought last summer. I had used a Laura Star steam generator for about 10 or 12 years so it took a bit of getting used to to go back to a regular iron, but I really like my Oliso.
Here's the purple Oliso from their website
http://www.oliso.com/olisor-smart-ir...100purple.html
It appears to be a limited edition. I'm not sure what the difference is other than the color though.