Hi,
I personally think they have different sonic expressions - might be similar technically though.
I took the time to record different Doepfer 4-pole filters you might be interested in checking out:

http://soundcloud.com/jakobsweb/doepfer-a106-6-a122-a105

and

http://soundcloud.com/jakobsweb/doepfer-a108-a120-a102-a101-1

I hope this helps.

--- In Doepfer_a100@yahoogroups.com , "nik" <casadoro2002@...> wrote:
>
>
>
> i also have the 106-6 xpander clone...which is my favorite filter....!
> do you know if the LP 24DB slope it's similar to the 122
>
> --- In Doepfer_a100@yahoogroups.com , "jakobsweb" <jakob.paulussen@> wrote:
> >
> > Hi,
> > I totally agree with you on the sound of CEMs.
> > Personally I think the DE filter and a A-122 are quite different from another. The A-122 is one of my favourite 4-pole LPs (I have almost all Doepfer filter modules) as is the A-105. The A-122 has a lovely 'wet' and rather softish smack to its sound (with some resonance added and mod). Something I don't find with the DE's filter.
> > Of course it depends on what you feed into the filter, whether you overdrive it (level) etc etc ...
> >
> >
> > --- In Doepfer_a100@yahoogroups.com , "nik" <casadoro2002@> wrote:
> > >
> > > I really like theLow pass filter sound of the Curtis chips and especially Cem 3320 that is inside many analogues from the past like SCI Pro One..!
> > > I am thinking to buy the A-122 which has the curtis chip Cem 3379 which as i know is very similar to Cem 3320
> > >
> > > But i already have the A-111-5 (Dark Energy) module which has an one voice curtis chip (cem3394)
> > >
> > > So i wanna know if A-122 fllter sound is the same with the filter that Dark energy has...
> > > Both are curtis but Dark energy's resonance sounds a bit distorted and not so clear ...
> > > Is A-122 better or different
> > >
> >
>