Focusing screens for Hasselblad 503CW

I am currently using the standard ( Acute-Matte D ) focusing screen with my
503CW camera. The image is generally very bright and easy to focus using the
80mm f2.8 lens.  However, as a spectacles wearer I occasionally have
problems focusing quickly and accurately, especially in poor light or with
low contrast subjects.  I can't blame the camera for out of focus shots any
more now that I'm using Hasselblad!

Would changing to a Microprism/Spit-Image (Acute-Matte D) focusing screen
solve my problems?
Is their any difference in brightness between these two screens.

Thanks for any help.

P.Mc.

P.S.  I get a much better view through my old Mamiya C330s focusing hood
magnifier ( with a Beattie Intersreen ) than I do on my new Blad!