Does anyone know why the same strain of yeast sometimes produces different coloured sediment in the bottle? I've seen it vary from a toffee-brown colour in some batches to almost white in others. Does it indicate yeast health or something?
I agree it is a RDWHAHB situation. But, to name a few variables that impact that: Temperature of fermentation. OG/FG. Temperature of conditioning. How much priming sugar made it into that bottle. Age of the bottle. The generation / age of the yeast.