I own both the LP53 and the Cryorig C7 cu and a few fans. Until I complete my case design, my pc is running as an open bench. I've used both of these to cool a delidded, lapped and undervolted 8700k & no matter what, the LP53 w/ the stock fan works the best... even over a Noctua B9... albeit it's louder. At 100% cpu usage, the Cryorig can't hang on, it just slowly climbs in temp. I have an ID-Cooling No 9215 on the way, thinking if I run it below max rpm, it'll be the best 92x15mm for a super low profile setup.
As others have noted though, the LP53 interferes on some itx mobos. I have the MSI z370-I and I can only mount the LP53 perpendicular to the ram unless I want to run only 1 ram stick. The Cryorig didn't have this problem for me.
Side note: The sticky'd cpu cooler roundup thread shows these two much closer to each other than I've seen from my testing. Maybe my results will differ in a more enclosed setup... we'll see.
Edit: Just thought about what you said. The Cryorig C7 only has two heatpipes, they just wind through the body differently. See here:
https://grabcad.com/library/cryorig-c7-fins-1