When I say m4/3 and 4/3 sensor are of different size, I meant they are different size as compared to other sensors like APS-C and FF sensor, thus the sentence behind that first sentence. Secondly, m4/3 and 4/3 are not the same sensor, they shared the same sensor format but not the same sensor.
And I am well aware that SLT is not sensor but translucent mirror, what I meant in my first post was that Olympus might be interested in the SLT technology but not the APS-C and FF sensor technology... and I quote from my first post to this thread,
Note that I say, DSLR lineup if they decided to go back to DSLR. I have not mentioned anything mirrorless in that statement.
I hope that clear up some air.