There are quite a few people with drone issues from Borla just FYI.
Yes! The Borla exhausts with deleted resonators will have audible exhaust at certain RPM ranges. Word on the street, however, is that Borla did a pretty decent job of tuning the resonance above most normal driving RPMS. That's why people are picking it up more at 80mph. *I* wouldn't buy them but it's probably a less offensive option than the others.
Ford spent hundreds of hours with engineers to get rid of the drone on the stock exhaust. It's an extremely complex problem.
I'm not even certain that the FOMOCO Ford Performance by Borla will be entirely drone free, but I think if it isn't it'll be pretty close... as it has a resonator that is tuned for noise cancellation.