Advanced legacy lens user: What to choose Olympus OM-D E-M5 or Sony NEX-6?

YuriS wrote:

I’m enthusiastic photographer (for about 25 years - not professional). Currently I use Olympus E-PL1, my favorite activity – take landscape pictures with Fisheye and, along with my wife, shot art portraitures with legacy manual lenses (especially Minoltas 50mm and 85mm).

Two candidates (Olympus OM-D E-M5 and Sony NEX-6) are perfectly fit to me. Besides lens availability (not so important to me – I use legacy and adapters are cheap) there are three major differences:

1. In body stabilization - Olympus OM-D E-M5 win

2. Larger sensor - Sony NEX-6 win

3. About 25% (in Europe) price difference. - Sony NEX-6 win

Does Larger sensor for less money worth more than In body stabilization? M-m-m-m… May be yes. So Sony NEX-6 looks preferable. Or possibly I am missing some other points? Please comment.