Can only 1/2 answer your question..! I use dr5 trannies for all my b+w work, mostly MF but some 35mm. I can't compare dr5 scans with 'traditional' b+w, but I can comment on the dr5 scans. In my experience dr5 trannies scan very well and easily. I use delta 100 as my mainstay, but have also used Kodax 100 TMX, Adox CHS 100, Ilford SFX, FP4 and HP5, all of these 'standard' dev1 and dev2 'sepia'. The all scan fine, with beautiful tomal range. I often get Lambda prints made from scanned trannies.
Sometime soon I hope to post some stuff in the gallery.
Hope this is useful,
G