Need Advice. OMD EM5 or X-E1 as FIRST SERIOUS CAMERA to learn Photography?

There is only one way to decide. Go to a store and play around with both. If one of them comes out feeling better - that is worth A LOT more than the tiny difference in image quality, or autofocus etc.

For the people who mention that you need to consider that you are buying into a system - they are right. m4/3 have a lot more selection on lenses, but the X system is slowly growing too so if what you mainly want is there now its not a huge reason to pick the OM-D instead (there are no tele options without adapters atm for the X system afaik so if you want this then no X-E1).

I have an OM-D and love it, I thought the X lenses felt a bit too chunky and the OM-D felt better in the hand.