Carp is deep and loud, no wait LOUD. They sound like what they are, open pipes. Ever heard a subaru with no cat no muffler no reasonator? That deep burble, kind of boat like sound, that's what carps give.
CES sound a pitch higher, but still deeper than any other multi-cylinder bike (aside from maybe the crossplane R1 or RSV-4 when at low RPM). It's quiet when your tooling around (still louder than stock), and its loud when you're on it. I can turn and talk to my passenger in half helmets at a normal conversation voice at 30mph in 2nd or 3rd gear with CES.
Best type of way to describe it I can think of is:
Carp - Long tube + no cat + no muffler on a vette - Sound super angry, nasty, mean, rages on your ear and sounds like a race car
CES - Long Tube + with cat + muffer on a vette - Sounds pissed off but under control, clearly not stock, but doesn't sound like it wants to rip your head off and kill your family.
I like BOTH sounds, but CES are vastly more acceptable to the general public. They have enough bark when you blip the throttle that any car near you WILL hear you, no question about that, but not so loud at low opening steady throttle that everyone around you will look to see what that really loud strange noise is.
Jardine's and CES are about identical in volume of the exhaust, but the tone is quite different, Jardines are deeeeep if that helps you at all.
CES Clips coming shortly in video format, listen to what you can hear besides the pipes: Shifting, intake sounds, valve train, etc, you can still hear your bike clearly:
Tooling around with CES:
2,3,bit of 4th gears WOT CES:
Carpenter, you can hear how raw it sounds well in this video, and the exhaust sound drowns all other sounds out, not sayings its bad, its just way louder:
For reference, a video with really similar audio sensitivity to my clips same POV @11:24 he actually starts using some power and you can hear the difference compared to my 2nd vid:
I tried to find the only clip I knew of from my POV on a carpenter Brute equipped bike, but the owner has taken the video down, so no apples to apples comparison sadly.