looking at the stats now (which isnt saying much, but at least some, R-41s can MURDER uglies.
Look at the ionic capacity. 1.
Just the single number 1.
That means it would only take a single sneeze from a single ion cannon to disable an ugly and leave it floating helpless in space.
And considering each R-41 has 2 ion cannons, AND 2 heavy blasters (those can probably 1 shot destroy an ugly anyway) ANNNNND 2x proton torps.... I think it R-41s can take uglies at at least a 4:1 ratio.
Not to mention they are faster, more manuverable, and more durable.
Oh and R-41s are smaller.