I don't believe the SBE has a one piece receiver/stock like the nova.
mine dosen't
I saw a guy drop his SBE 15' this winter in -12 temps .
most things get very brittle in these kind of conditions
as far as the question, i like rem 870, moss 835, and the benelli. i have used all 3 and own 2 of the 3, and there were things i liked about one and not the other, imo the nova was as good or better than the others