It's the opposite for me. Cherry tomatoes get tomato blight first and most kinds of heirlooms tend to be the most resilient.

In the end all of them get blight, no matter what I do, even if I spray with fungicides multiple times. It's the reality of growing tomatoes in 6B zone - summer is short and as it gets colder during the nights the blight takes over. All I can hope for is to harvest as much as possible before that happens.

At the same time tomatoes in warm and dry (thanks to drip irrigation) greenhouse will remain blight free - I'll be picking the last ones shortly before the first frost outside.