A tub is a tub, they all look the same. 28qts are usually about 23" L x 16" W.
Bigger is much worse actually. Adult males are smaller than adult females (sometimes 3x smaller) and honestly don't need anything larger than a 32/28qt.
Ball pythons like security, it's in their nature. Smaller enclosures with less open space gives them that security that they need. Sometimes, big enclosures will stress out ball pythons so much that they will go off feed for months.