Regarding hardness. How hard is hard enough for max casting distance? The rings are not deforming, not being dented, not even wearing. The loading from the line is about zero when casting. If you can find a coefficient of friction difference, then maybe there is a difference in performance. But I think it will be insignificant compared to the other factors I mentioned. On most of the guides I inspect, they are coated in crud from the water and clean only where the line hits on the cast. So the line is also a crud cleaner.
What won't the Torzite do? Torzites will do everything other guides will do. And if they are lighter, then the rod will be more sensitive. But I didn't get that sensitivity was an issue. If lighter, the rod will recover a little faster, and that's good. But lighter than what, and by how much? Check the guide weights between different identical geometries and the lightest will be the best.
Enough to justify the cost? A torzite 20 mm KLH costs $41.00. One guide. I haven't priced the set for your rod, but likely about $200.
If you are willing to pay whatever it costs to possibly get the absolutely longest cast, even if it only exceeds the options by a couple yards, then torzite is the answer. But you can do much better by simply going down to 20#.
Keep in mind that wonderful striper you fear may not even be reachable with any 30# rig. And if you hook it on 20, you will have significantly more line on the reel. And if it gets close to spooling you, chase it. While you are setting up for a very low possibility, you are giving up the more likely chances at fish outside your 30# casting range.
But yes, regardless of line, torzites are the best. But no