Pricing on these planes is pretty complex. It's a stretch to say that airbus is unequivocally more expensive without comparing various options.
Source: my brother worked for Boeing in sales and has been in the industry 30 years.
Yeah, also nobody pays list price.
Indeed, but the practical result in this case is that the A320 is _much_ more expensive, because demand is far higher. Ryanair's big purchase of 737 MAX-10s a while back was at, at most, 50% of list price; that degree of discount isn't really happening for the A32x at the moment, I don't think.