Biggest vs. best
There's not much overlap.
Regardless of how you measure 'best' (elegance, deluxeness, impact, profitability, ROI, meaningfulness, memorability), it's almost never present in the thing that is the most popular.
The best restaurant, Seinfeld episode, political candidate, brand of beer, ski slope, NASDAQ stock, you name it. Compare them to the most popular.
Big is a choice. So is best.