Sungold cracks very easily, helping it reseed like a weed year after year. This is the only tomato that pops up in late spring and matures quickly enough that I actually get to harvest fruit in August. All others I start indoors. Long tassels of delicious tomatoes grow on huge disease-free plants. It's impossible to pick them all. Effortless gardening with no problems common to tomatoes in the PNW. I don't cage them, I don't even water them. They seem to grow true from seed, it's been three years and so far they're the same Sungold I first planted.
I find Sun Sugar to crack much less and is perhaps a bit tastier. It's harder to find as a started plant, and I can't speak to its reseeding qualities. I'm also in the PNW and it ripens well for me (sometimes a challenge for our short season).
I want to live in a world where the chicken can cross the road without its motives being questioned.