I have teal, cherry and blue ombre (my non-patent sabrinas), and I've treated them with apple conditioner and apple garde (at least two solid garde applications apiece). So far, so good-- very little color transfer, very little scratching (none that I've noticed, and I tend to be a scratch nazi).
I've seen some new Sabrinas with scratches at the outlet, so I would say they can be vulnerable to scratching. It mostly seems to happen in certain colored bags though, where they have used one color over another lighter color base, so when there's a scratch the lighter color shows through.
I have 4 sabrina's with no scratches 2 are reg leather cherry, light gray, just condition them up really good with the apple and make the leather supple. Any marks I would think would rub right out. Just my thoughts and how I did mine. good luck