On having more than one type of tomato plant

she means having slicers, juicers, sauce tomatoes etc. Different tomatoes for different needs. There are also determinate(all ripen at once and they may be one shot wonders, mainly juicers and sauce) and indeterminate(ripening at different times and generally continuously mainly slicers). Some have more Lysine than others, while another one will have more vitamin C. Yellow ones are pretty and tasty, but the deep red ones are better for certain needs, purple and orange ones provide slightly different vitamin contents as well. The ones that are green striped have an entirely different make-up.