I'm no heavy user of of either although have run Replicant, Cyanogen, and
Android versions to test functionality/usability/compare. Between this and
what I have read Replicant is similar to Trisquel in that its main purpose is
to provide a version of the operating system that is free of propritary
pieces.
So you can think of Replicant as Cyanogen without the non-fre software.
You can think of Cyanogen as a heavily modified version of Android. The main
thing that I see in Cyanogen is it gives users back control over the details.
Google has tailored Android to provide it with a source of revenue. In the
process they force a lot of undesirable restrictions on you. It's not as bad
as Apple in that they cooperate with the free software movement to a minimal
degree. Google is far from being setting the standards on cooperation with
the free software movement though. They could be said be more aligned with
open source proponents.
