This one always seems a bit illogical.
First, the suit does matter (this isnt the illogical part). If you are against 2 black aces, then red suited connectors have a better chance, for example.
(All are suited, in a non-ace suit)
10J = 21.55% (has overlap with Broadway str)
910 = 22.61% (has overlap with Broadway str, but the 9 is "free")
89 = 22.47% <---- This seems an illogical trough
78 = 22.87% <---- the best
67 = 22.87% <---- the best
56 = 22.87% <---- the best (has overlap with the wheel, but doesnt matter because it top-ends the str)
45 = 21.44% (has overlap with the wheel)
Welly