Coming from 5D Mark III --> Olympus OM-D: First Impressions & Comments on DOF

Helpful comparison, thanks!  (I much prefer the OM-D shot, all of the face and most of the hair in focus...)

I'd like to know if anyone can answer, please, in order to get the same DOF in the 5D and the 50/1.4 shot as we see from the OM-D and the 25/1.4 shot, what would the 5D aperture need to be, please?  f2.8?  That is, if the OM-D x2 crop factor turns a 25mm lens into a 50mm equivalent, does it also therefore turn the f1.4 aperture into f2.8 equivalent?  Thanks!

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Lester