Is Healthy Resolve Multivitamin from Advanced Bionutritionals, superior or roughly equivalent to the Kirkland Signature Adults 50+ product from Amazon?

We see it as being superior and for the reasons you know already, that more is usually better. There has been some careful thought given to the additional phytonutrient mix contained in the Advanced Bionutritionals product, and their array of choices is, on balance, more advantageous for the average user than the Kirkland multivitamin.