[Joe Ross]

I don't see any rule that requires a specific version of the analog breakout.

The red one is older and has a switching regulator. This gives it higher current output (3 amps), at the expense of more noise. The blue one has a linear regulator with lower current (0.25 amps) but lower noise.

The FIRST 2011 analog breakout specifications from the kit of parts website are misleading, because it pictures a red analog breakout but describes a blue analog breakout.