Based on that pic, I'd say you have a Brunswick, not a doubt in my mind. Brunswick is not known for good flavor, and it's typically reported to split and sour in heavy rain. I have three unknown variants, and two are finally fruiting this year (3 years later). I've been told by tasters that I trust... Brunswick is lucky to rate a 4/10, still better than a regular Brown Turkey, but not much, at least BT doesn't normally split/sour in rain.
My personal opinion - it's worth keeping for the foliage, but you'd be better off to swap it out for a Ronde de Bordeaux which has similar (if not more striking) foliage.