bigger is not better. use the search function, its been debated every winter season since 2002 here
You and John B is correct.
Bigger (thicker) is not better, it is a matter of technique regarding gloves at least, and one of the biggest mistakes is to wear super thick gloves
Atan Boots will give you the best barefoot feel even in the winther !
Have been using these since the mid 80's in windsurfing, and EVER since.
Have even tried other boots now and then, when the old ones wore out and I was desperate - but they were all crap, seriously
But as Scklandl wrote, try to use the search function regarding this topic