How Good is the Olympus 40-150 at 150mm for sharpness?

"'I have 40-150mm and 45-200mm. At 150mm Oly is about as sharp as Pana at 147mm but Pana also has to be stopped down to at least F8 for good sharpness.
But, in 40-100mm range Oly lens is significantly sharper than Pana and it can be used wide open. 40-150mm is actually pretty sharp lens."

I disagree. I had both at the same time.

The Panasonic 45-175x was sharper at every focal length than the Olympic 40-150.