So with the progeny labeling you will find more phenotype stability with the odd numbers with the F1, F3, F5 and more variation with the even numbers F2, F4 even later into the breeding program like F6. It's the opposite for selfing the even numbers will show more consistent phenotypes. I wouldn't expect there to be much difference at all in the phenotypes with the RBF between the S2, S3, or F4. I don't know how well the line had been worked before I got my hands on it and started to self it. I haven't noticed much phenotype variations with the aroma or flavor but the duration of the life cycles have varied a bit and plant structure has a bit of variation with the S2 progeny. I expect the S3 line to have the most consistent phenotypes as far as life cycle and size. The F4s I used the quicker smaller pheno and crossed to a bigger more terp rich phenotype that had a bit longer life cycle. My personal preference led to me like the bigger longer running pheno that I made the F4 beans with a bit more because the terp profile was just a tiny bit better and the effects hit just a bit better but honestly there was very little difference.
