Harry, finder flare was never a problem with the M3 I had for 17 years, and it has not so far been a problem with the M2 I now have. However, while some users have complained of flare in the M2 finder, I haven't heard anyone speaking of flare in the M3 finder. I'd say the difference is at most marginal, though I don't have the details which you will have got from DAG.