This is what I did. The H-pipe sounds great. For the morning start-up I created mufflers out of beer cans, stuffed them with fiberglass and window screening. They keep the neighbors happy.
Videos included on this link that compares X-pipe to Y-pipe sounds. Regarding power, they report that X-pipe adds HP to the high end while H-pipe adds torque.
https://www.americanmuscle.com/mustang-h-pipes-vs-x-pipes.html
LOL.
Before buying my Mustang I noticed that when the stock Mustang wind out a bit, the exhaust tone gets raspy, or something. I didn't like it. Then I saw a YouTube video where the guy said he got the H-Pipe and the sound was lower and 'throaty'. I'm originally a Chevy owner - '64 corvette...