Hello Roman,
First off, welcome. With the limited info you have supplied I can only guess. Next, I'd make a request for pics as I'm unfamiliar with the "Salmon" rod and the Fenwick sounds like a Steelhead noodle rod for float fishing or bait. Here's some speculation on my part. First I can offer nothing with regards to the solid glass rod. The Fenwick with the FSH I believe to be a Steelhead rod for float fishing and/or light bait casting. I use to use spinning reels and bait casters with these type of rods, fishing spoons, spinners, and bait below floats or free drifting with the bait. The 2-6 b. rating is, from what I can dig out of my catalogs, the line range recommended, but I'm not positive. It would really help to know when the rod was produced and whether or not it is factory or a custom build. The one's I used where really light line rods and crazy to use.

The question of when Fenwick began to use ceramic guides I don't have the answer. I do believe that ceramic guides are hard enough to use with braided lines. If you have concerns with the braid grooving the guides, I would use the modern round braids instead of the more common oval shaped ones. I really don't think this is a concern.

As to how to avoid buying Fly rods(wire guides) when you want spinning or bait casting rods ask the sellers to describe the guides on the rod, or look for spinning or bait casting designations. Avoid all combo rods, such as those designated fly/spin. Again welcome, I hope you get your answers. Respectfully rvreclus