which the difference between Barber LTD and Barber LTD Silver?

[ANDYEFFECT]

which the difference between Barber LTD and Barber LTD Silver? 
 
Volume 
Gain 
Tone 
 
internally does have the two controls? 
what does the one change resoundingly? does the silver have more gain or less?

[Doug_H]

Try emailing Dave Barber. He's a friendly and helpful guy.

Doug

[rhys]

i believe it's more of a voicing change than gain.  the silver has less midrange.  i haven't played the standard ltd, but i'm loving my silver. 

[Peter Snowberg]

No schematics for either one here.