Zola netted twice at Valley Parade to give Albion a 3-2 advantage after the first leg.
"All goals, as a striker will tell you, are as good as each another and these obviously were pretty special on a pretty special night really," he told Sky Sports News
"If you told us that would be the score at the start of the game we would have taken it. We would have been very happy with that."
Burton welcome Bradford to the Pirelli Stadium for the return leg on Sunday.