Resonator vs. muffler question...

[4-cam]

FU
Ive got 2- new Dynomax 17519 muffs that I would unload fairly cheap, say $125 for both, shipped. I went with the 17228 instead and just have these sitting around. The are not as loud as the 17228 I am told. I have not heard them on a ZR-1 but was told by Dynomax tech support that they do tone down the resonance more so than the 17228.
Where the 17228 spits in a Y configuration the 17519 splits in a T inside the muffler. This cancels the the resonance with the direction change but it is still considered full flow although i bet a bit less than the 17228. The external dimensions are the same size also. Pics below of the internals