I don't remember where, but yes, Isaac mentioned somewhere that a +2 would be "better" in that case.
It was ruled that Advantage/Disadvantage looks at what is a better/worse outcome, not at which is the better/worse card.
I would love to find a link to put in this thread for posterity. I haven't found it in search. All I saw was the FAQ which talks about different modifier cards:
"If I have advantage or disadvantage, how do I determine whether one attack modifier card is better or worse in the case of effects beyond the typical +/- modifiers? How do I know when something is ambiguous?
All added effects (negative conditions, elements, healing, etc.) have a positive but undefined value. Thus, these would be the rulings in the following cases:
+1 vs +2: +2 is better
+1 Stun vs +1: +1 Stun is better
+0 Stun vs +2: Ambiguous
+1 Stun vs +1 Fire: Ambiguous
+0 Muddle vs +2 Stun: Ambiguous"
Also, the rules mention that in any case with ambiguity, the card that was drawn first must be used.