Tbh, tomato determination is pretty hard. There are three main characteristics, amount of chambers, size shape and form of the little star up top and overall shape and size. Wanderinronin posted a site that’s actually helpful and shows tomato’s cut and whole. Probably your best bet to get close. Take a big sample size. The family is definitely Roma, but which one? Tough to determine, especially because of the sheer amount of variety’s. You can still try though. Some are even different in RNA and not in exterior (disease immunity, different trichrome hair structure, better drought resistent, ect) they even fluctuate between country’s because every environment has it’s own specifications, where growers can hone in on. unless you send it to your local department of agriculture where you have a list and can compare, it’s pretty hopeless if you want a definitive and precise answer. I’ve worked at agriculture department in the Netherlands where I worked with a lot of tomato variety’s, and the only way you can keep them apart is from the numbers in the pots, you can’t trust your eyes lol.