Just tried my Victor Bailey Jazz (18v active, neck pup, tone controls centred, volume full on) against my L-2k (passive, series, everything full on) through an EA i200 amp and the
VB and the subjective settings for equal volume were 9 for the
VB against 4 for the L-2K (the i200 volume only goes up to 10, though).
The Fender does not seem to use the circuitry to boost the output but for tone shaping. There is quite a bit of bass and treble boost there though. In comparison the G&L controls are passive and only cut the respective frequencies.