I guess it's a matter of personal taste. Ok maybe heavily flavoured by the particular Gm, but that's a different issue.
I've played Chill 2nd Ed and it was quite fun, light hearted, but quite content with it.
Also played Cthulu a few times, didn't enjoy it. Summary each time: chew some time rolling up a PC. Investigate something for a couple of hours. Open a door. Fail a roll. Out of the campaign (without even a description for what had stuffed you). I didn't enjoy that. Different GMs, same outcome. Maybe not a coincidence.
I've heard there's also a Cthuluteck (or similar name) but never played it.
Ok, that's my 10 pence worth.
Cheers.