Here is Mike's Flowmaster setup (before): https://www.youtube.com/watch?v=kEMn--WtyDM Here is Mike's Jegs setup (after): https://www.youtube.com/watch?v=umHcsPDFXx8
Once you get around to near the muffler exits, sounds exactly the same to me. Sounds different from the front, but I bet that is due to sound bouncing off of whatever is in the garage.
Sounded like it until they walked the camera over by where the muffler sound was exiting the car. Then they sounded pretty similar. I do like the deeper sound, if I had to choose between the two.
Many years ago I had cut outs that I would pull open at certain locations and times. It was ridiculous when they were open.