Deal still on as of today, but currently out of stock.
I can't comment as I've not tried the 10, sorry. All I can tell you is that the 15 is absolutely fabulous. If, subjectively, the Mortlach 16 edges it.
How's Ben 15 vs their 10?
Still working my way thru Mortlach 16 and Benromach 15 else might have gone for this.
Often £89 at costco