Yep, the boys mature about 1-2 years faster then girls. The reason projects move faster with females, at least from my understanding, is that you can breed your male to her, hold back a male het from the pairing and then breed it back to the original female. Which would only take about a year because you're raising a male.
I suppose that since you already have a breeding female you wouldn't be saving much time (you'd still be raising a male and a female) but in the long run I'd rather have a visual female because it will give off hets 100% of the time. I want to avoid possible hets as much as possible.
The same is true with freeway/highway, I would never buy either of those morphs because it would be impossible to tell the yellowbellies from the asphalts/gravels. I'd want to buy a super asphalt/gravel so I can know for sure what the babies are.
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