Plum Tomatoes are usually considered as more Meaty than other type of Tomatoes, apart from the large Beefheart Steaky ones of course. However they are used mainly for Beefing up a Tomato Sauce and Paste. Their shapes are oval, they  do look like a red egg, small or large, full of juicy flavoursome flesh.

Compared to normal medium Tomatoes or Cherry ones, the Plum Tomatoes (On the right) differ by its shape and flavour: Stronger, and more compact maybe fuller of Tomatey taste.