Volume makes all the difference in the world. I was able to crank it up today and I sat my blackface Vibrolux on top the NL212 to see how close I could get them. I found that really cranked up the NL212 sounded better with cab sims off. I also found that with cab sims on and messing around with the global graphic EQ that if if boosted 2 or 3 db at 2k and 1 or 2 db at 4k, cut 31 hz all the way down, cut 63 hz around 6 db, that I could also get the NL212 and the Vibrolux to sound pretty close.
I think I may be starting to get this. Also, I really love LVC's Dumble preset.