I've been looking at some of the pictures recently but it is very difficult to notice the difference between the plants based on the pics of one single flower... The most important things are flower beauty and length of blooming, plant shape and presentation during and after flowering, easiness of growing, fragrance, leaves beauty and a million of other things that I know nothing about...And it should be able to grow in Toronto
For whatever reason Bartzella (which is not TP, I know ) did not manage to catch my attention after so many years of growing it and once I saw TP which was looking just regal and smelling heavenly as well. Search for the Holy Grail, I guess. The owner did not know the name, as usual...