Seems the question's been well answered but I'd add that, on top of the actual leather quality, there's also a question of the tanning process and quality there.

I ordered a super nice, dual leather strop from Tony that would've been a deal at twice the cost and simply requested a practice strop with the order. The practice strop will likely be my "traveler" or maybe what I use on my Chef's knives and better quality carbon steel knives.
Jack