Hi Peter,
I don't own a MY Signature Gold (Only the former top dog Ultra Eminent BE) and have never owned an Airtight. I do feel and all those familiar with my system as well that the COI is in the same league as the Atlas, t and GFS. Like I mentioned earlier, I do think that at this level, there are no gross deficiencies only differences in emphasis. If I were pressed to say which I liked best, I wouldn't be able to give a definitive answer. They all excel at different things and none do anything wrong.
I don't own a MY Signature Gold (Only the former top dog Ultra Eminent BE) and have never owned an Airtight. I do feel and all those familiar with my system as well that the COI is in the same league as the Atlas, t and GFS. Like I mentioned earlier, I do think that at this level, there are no gross deficiencies only differences in emphasis. If I were pressed to say which I liked best, I wouldn't be able to give a definitive answer. They all excel at different things and none do anything wrong.