hmm, all 7 of my plants are pretty stocky and robust, but that's because I have them in a makeshift
greenhouse I built. They were pretty lanky before, but I planted them deeply, and now they are all quite beefy. I know that within that mix are 3 different sorts: cherry, normal and bush tomato.
The only difference I can tell right now, is that on some plants the tomato vines are located on the stalk itself, and on others the vines are on the branches...