It's really strange how plants grow at different rates when treated exactly the same. I planted the seeds for both of the San Marzano seedlings pictured below on the same day using the same soil mixture. Since then, they have been watered at the same times, and exposed to exactly the same amount of light under the grow lamp. Yet one is doing very well, while the other is growing at a snail's pace.
These Italian heirlooms are said to be among the best paste tomatoes and highly desired by pizzerias. Hopefully we'll be able to perform our own taste test to find out just how good they really are.