Here is a past thread to read
Is linen neccessary + The difference between linen and cotton - Straight Razor Place Forums
You might really want to look at post #16 I could go grab another strop right now and show you the exact same pics again :)
There are micro particles that come off the edges... I would rather have the Linen look like that so I can brush it out or even wash it out. rather than digging it's way into my good leather...
Plus like most of the guys said I think it works better too :)