Comment by chubot

Heirlooms are less consistent for sure. They can be more sensitive to their growing conditions too.

But IMO commodity tomatoes are some of the "easiest" things to improve upon. Regular supermarket tomatoes are often flavorless, the farmer's market tomatoes are often better (e.g. in California)

So heirlooms have higher highs and lower lows

IMO commodity tomatoes are consistent, but consistently "meh" ...