Saddles have a small range of feather sizes so you might obtain a saddle that has feathers predominantly in the 12, 14 and 16 sizes only, which is great if you do most of your tying in these sizes (I should note that there are saddles that have smaller ranges, maybe 16, 18 and 20’s. Similarly, the range can be among larger sizes as well. Many fly tiers like saddles better for several reasons: first, since they do most of my tying in a small range, it’s more economical to pick out a saddle that will satisfy their need for a long time making it a more economical choice and second, their long stems make them easy to wind around a hook without the need for hackle pliers, which can be a nuisance. Personally, as a 30 years fly tier,I like the idea that I can usually get 4-5 dry flies (or more) out of one saddle feather.