The Omega is a very nicely configured 30 cal suppressor. It is very quiet for its size and weight and is versatile with mount and end cap options. Others may meter better but most people who've heard mine think it sounds as quiet as larger suppressor they've heard. It's really subjective and environment dependent.
I've run it with the muzzle brake end cap on 308 and 6.5 CM. On 300BO SBR it does well with either ASR mount on flash hider with flat 30 end cap or for shortest it can be direct thread where it is only 6.2 in long and maybe 13.5 oz. both confuse sound the same to me but the ASR mount is handier. On 223 the muzzle brake makes for a blast baffle and the 223 end cap is available although to my ears the 30 cap sounds the same.
The Omega has a very tight bore on the internal baffles that are tighter than the end caps so you always want to check the mount with an alignment rod with the end cap removed. The ASR mount occasionally carbon locks but newer production has an improved mount that is supposed to address. All the mounts and options really add up but it is a great all around 30 cal can. To get quieter you have to go bigger and longer and to keep the weight down that usually means titanium and expensive as well. Point of impact shift is consistently down about 2 MOA across several hosts and repeatable. No impact on group size or maybe slight improvement. It's 'hearing safe' on bolt guns but the port noise from an AR on anything super sonic still rings my ears a little.
Right now is a buyers market for really well made rifle suppressor so. Silencerco has a good record for being responsive to customers and innovation but Griffin, Dead Air, Rugged, SAS, ThunderBeast, Gemtech, Sig, and others all have good competitive designs.