Do the cmos dual op amp chips like the CA3260 or TLC2262 sound/work like the 4049 cmos?

Nope... They work like regular old opamps.  As far as sound, I think the latter sounds a little more graceful, IIFC.  I haven't experimented enough with 4049s to anwer any further.

They sound like dogs when they clip - intermodulation is bad!

With all the  amps I know of it's only the output that is CMOS and the gain is as high as any other op-amp so clipping is harsh not soft.

I only use a handful of CMOS op-amp chips and all are bad in distortion circuits* (well, compared with the 4049), but perhaps someone out there knows better?

*edit: when driven to the point of clipping that is, they sound fine in diode clipping circuits.

In a back issue of Vintage Guitar, country slide master Lee Roy Parnell praises the Ibanez MT-10 Mostortion, which doesn't seem to be all that different from a number of similar boxes EXCEPT that it uses a CA3260 dual MOSFET op-amp.  I've seenhim on ACL but I haven't knowingly heard him playing with one engaged vs disengaged, and have not tried one myself or heard any sound samples, so I can't judge if the quality of clipping is different in the unit by virtue of the op-amp alone.