   Just traded my 2007 Mazdaspeed3 for a new 2010 Speed 3.  Only have 100 miles, so more on the handling and performance later. But initial impressions are all positive.  Quick comments:  2007-09 versus 2010: Facts:  Gone are the HID headlights and LED tail lights. Temp gauge is gone BUT now has a turbo boost gauge.  I like that trade, but both would be better.  Standard stereo is only a single CD changer not 6-disc Rear cargo liner from 07 fits perfect in the 2010.  Winter mats from 07 fit fine in rear and OK in the front.  Some gaps in front.    16 winter wheels and tires from my 07 fit on the 2010.  Lug pattern, and hub diameter are the same. Still no heated mirrors.   