I’ve had this image sitting on my desktop for a while with the intention of posting it so I don’t remember who sent it to me (let me know in the comments if it was you so I can give you credit), but this is a great chart showing the differences between all of the currently available Windows Phone 7 devices.  If you are interested in picking up one of the many different models of devices running Microsoft’s new Windows Phone 7, you might want to consult this guide to help you figure out which is the best device for you.  This chart compares everything from the thickness and battery life of every device to their screen sizes and amount of RAM.  The image is rather large so to view it, you should click to enlarge it and even then, scrolling is likely going to be required.  I hope this helps anybody looking to purchase a Windows Phone 7 device!