The answer is yes, well, kind of yes. Let me explain. A2 milk benefits from a more consistent feed, and usually a higher quality feed, which results in a higher quality milk that also contains more proteins. All this goes for producing a better quality steamed milk - with a bit of technique, a velvet smooth and creamy milk for your flat white or cappuccino.
If you don't want to pay the premium for a2 milk, there is an alternative in regular milk - reach for the full fat variety instead of the low fat alternative - the sugars in regular full fat milk will allow for a fuller and more creamy result compared to low fat milk or skim milk