Hi frogsleap-
You are getting some beautiful results. I have one that is similar in size to your green one above. It is at F4 - I'm still working towards stable, open-pollinated strains. Here's a photo. The others are of a grape tomato and a pink and blue cherry tomato.
Some have that 'Sungold' scent and similar flavor. I'm not sure how stable those ones are, but so far, so good. I only grew two plants of speckled blues this season, but they are true to type.
Lee