Doepfer

Hi everyone,
I was wondering if anyone is able to point out the sonic characteristics of the A-101-2 vs A-102 vs A-101-1.

I have the A-102 and like it for its deep sub-bassy sound.
I also have the A-101-1 Vactrol Filter which has yet to reveal its edge to me and seeems to go into another direction.

Since the A-101-2 Lowpass Gate is based on the vactrol technique as well, I'm hesitating to order it and am afraid it might be no more or less than the low pass out of the A-101-1.

I'd be grateful for any help.