Sure, the pressure goes up by 0.6. Unless you are highly susceptible to narcosis, I don't think it matters that much from that, as when it comes to technical diving, an END of 100 feet is the target for gas selection. Gas consumption goes up, but not a huge amount. I don't have dive software/tables to compare NDLs at those two depths.
I don't know what you are getting at. One value is 10 feet shallower than the depth to which open water divers should be trained to reach and the other is 10 feet deeper. The industry has to set some value (my opinion - yes, I do realize some open water certifications are set to 130 feet - which I don't agree with, but that discussion would take this even more OT).