Are the Marmande a bush tomato? The Sub Arctic start to branch before the flowers are open, so that's how I'm telling them apart. The reason being that I had a massive tomato seedling disaster, when a flying football knocked over a whole Jumbo tray full of cell trays of tomato seedlings. I now have San Marzano, Rio Grande, Shirley, Amish Paste, Sub Arctic Plenty, Costoluto Fierontino & Salt Spring Sunrise completely unlabelled...

Thankfully, the SAP & Rio Grande - both bush types, have been very easy to identify!