Possibly no discernible difference since they have dynamic EQ.
I literally made this post because of the perceived difference. Which was strong enough for me to take the time to create a post asking about the measurements. Then find a graph that corroborates my initial perceived change. Gonna go ahead and conclude it’s a discernible difference.
Or are you chalking it up to a possible eq change and not hardware change? Either way the bass is definitely greater. I wasn’t expecting it or listening for it but had several jaw dropping moments while listening.
I run 2 18” ultimax sealed subs for my main listening in my living room with two open baffle speakers each with 15” woofers so I know what good 20hz sounds/feels like (with measurements to back it up). Not a flex as I’m sure other can wipe the floor with my system, but just to give context that unknown what good/even bass extension sounds like.