Any obvious advantages tone wise to mono rail type bridge/saddles?

I've pondered on maybe changing the stock Ibanez B10 bridge on my Ibanez GSRM20 Mikro Bass with a GSRM20B body and bridge for mono rail type bridge/saddle pieces, primarily because I would like to decrease the string spacing from the current standard 19mm to a slightly tighter spacing, perhaps something like around 17,5mm, which the mono rail bridge/saddle pieces would easily allow for, plus I think it could look cool, but would it be realistic to expect any advances to it tone wise, like improved string definition and/or sustain, or shouldn't I expect much of a difference?

Also any brands/models better than others, or would it be perfectly fine just to use the cheap standard Göldo mono rails?

Also would the material they are made of matter, like zink, brass or steel, and what to expect from those different materials?

 

I kind of planed to use a strip of shielding copper tape with conductive adhesive and apply it over the regular bridge ground wire and across under the mono rail bridge/saddle pieces, would be a simpler and more obvious solution, as far as I am concerned.

 

I even applied a rectangular piece of shielding copper tape under my current stock bridge (where I also scraped off the black finish of the bridge down to the metal), over the bridge ground wire for a larger contact area to the bridge, aka better ground contact.

At least it seems to have reduced background noise slightly, though that might just be me imagining things.

 

I probably ought to, but honestly I am too lazy to shield all the cavities properly, but I did replace the thin unsheilded stock wires from my currently installed DiMarzio Model P with shielded wires, with the ground wires running all along around the insulated lead hot wires as a braided shield, and that did reduce noise substantially.

Back when I had the EMG Geezer Butler P pickup installed it was dead quiet, even without the bridge being grounded, cause those pickups are internally shielded and use shielded wires as well, with the ground running all along around the insulated lead hot wire as a braided shield.