I have seeds by both names in my collection. I got the Southern Belle ones from a trade (she also got them from a trade and had no more info). They seem to only be advertised from one website (with a fictitious story) - so no idea what they actually are. The Pink Sunshine seeds I got from Wintersown last year and the tomato produced was very tasty and a color I've never seen before. It was pink but almost glowed in the sunlight. Pretty neat. I'll be growing that one again this year. Can't dig up any information on it otherwise though.

Thanks, I found the grower of the Pink Sunshine, who really liked them. The Southern Belle is questionable as to origins, like you said.