Both are using the 0.52-test3 tag and linked to the newer JACK lib.
Here are the build steps for those who want to "follow along at home" on a newer system with Xcode 13 (or CLTools) and JACK installed:
./configure --disable-jack-framework --enable-jack --enable-universal=arm64
make
mac/tcltk-wish.sh --arch arm64 8.6.12
mv Wish-8.6.12.app Wish-8.6.12-arm64.app
mac/osx-app.sh -w Wish-8.6.12-arm64.app 0.52-0test3-arm64-jack
make clean
./configure --disable-jack-framework --enable-jack --enable-universal=x86_64
make
mac/tcltk-wish.sh --arch x86_64 8.6.12
mv Wish-8.6.12.app Wish-8.6.12-x86_64.app
mac/osx-app.sh -w Wish-8.6.12-x86_64.app 0.52-0test3-x86_64-jack
As far as I can't tell right now, building a universal Tcl/Tk Wish.app succeeds but the resulting app bundle is not runnable. If I build as single arch, it runs ok, so the fault lies there.
I tried making an updated universal build with JACK but the resulting bundle doesn't run even on my own machine, so something is wrong with the build or the script which assembles the Pd .app. I will look at this.