The right piece just looks too bleached out for me.

Get solution dyed nylon or Olefin based product and it can be cleaned with bleach if necessary.

You just have to be very careful to understand how bad the situation is and proceed accordingly.The surest way to address mold is to gut everything - which we've done, but it's obviously very expensive.More practical options are to use ozone generators to kill mold and use bicarbonate soda (not bleach) to clean up what's left.Where you can get into trouble is if you don't properly address the mold and then a renter or buyer has an issue later and wants to sue you. 

That necessitated me using bleach directly on the faded stains which finally came out.

Expecting the tenants to clean up mold with bleach is not, in my opinion, a viable way forward to address the issue.

Use lots of Amonia, Bleach, A combination sometimes of both and also lots of fabuloso, pine-sol and Mistolin.

Sometimes you can clean it up with bleach solutions.  

We purchased top-of-the-line grey towels for one of our rentals and our first guests used some sort of cosmetic stuff that bleached significant areas of the towels so they came out quite blotchy and unusable in the rental! 

You may know all of this, but for showings we arrive 90 min prior and clean the place top to bottom--cobwebs, spray bleach (helps during COVID), put in citrus scented plug-ins, open every blind, turn on every light and my wife and I are both there and smiling, conveying a family/homey vibe, which is our branding. 

You can fix most defects with glue, sandpaper, a wood plane and wood bleach."