well, don't have a N9 or N950 to compare, but...

nightly being fennec_8.0~a1_armel.deb
and the other is of course microb...

obviously the score is browser technology based as FF8 on a PC (Linux 2.6.37.6-0.9-desktop x86_64) gets exactly the same score...

thus N9 should get the same result...
still as far as the future of (mobile) WWW goes, N900 still seems to be up to date