The Stradic FK is basically the same as the Stradic Ci4+ FB but with an aluminium body rather than the lighter Ci4+ construction. This makes it no less a reel, but in fact potentially makes it a better buy - depending on the rod you're sticking it on. Being slightly heavier this actually means that the FK is often better balanced (and feels lighter as a result) when placed on a rod. Especially if you plan on using a smaller reel with a longer rod. For example, I prefer the 3000 FK on the Tailwalk SSD 9 footer over the Ci4+. Then it can just come down to cosmetics.... They're both incredible reels so ignore the slight price difference.