i have a ush, and had a tracker II.
the ush barrel is much larger & heavier than the II,
the pardner barrel is no comparision to either...
as for accuracy, they both do well. with the right ammo.
my latest smooth-bore project will out shoot both at 50-75 yrds
much cheaper to shoot and light as a feather.
recoil is much reduced using the brenneke k.o.'s vs other smoothy slugs
and better consistant in accuracy.
thats my experiance, others may vary!!!!!!!!