sounds like a copy-paste from KTB?"Magnesium alloy components do not age well, becoming brittle with age,mag brake plates are best used on the shelf of the garage, when you really need them, they are quite likely to shatter under load."
apart from the materials, [of which I am familiar about the magnesium, especially the Campagnolo and Speedline wheels used on various Italian bikes notorious for wheel rims cracking while riding. had a mate's 900SSD wheel hub spin at a traffic light sprint whilst the rim was standing stil, all spokes broken! that was worth changing underwear...] the point is that these brakes can be improved without simply swapping them out for alternatives; that doesn't improve the original that's comparing apples and pears.
sure the 4LS will outbrake a 2LS will outbrake a double SLS. that is, if all is set correctly, with the same amount of effort.
then again, if my dads RE500 bullet with 2LS 7" drum brake can (b)lock the front wheel with 2 fingers, surely a double SLS in the Vin should achieve similar results? my Ducati 175 with 180mm double SLS grimeca can (b)lock the wheel too with minimal pull, and that's very similar in size to the 7" on the Vin!
difference with my Bullet 500 and former 2LS is the brake plate was flexing, doesn't matter what someone changes nothing will improve, ie the basis isn't good. changed to disc (for safety reasons).
look at proper Italian and jap brake plates (180/200/230/250mm Grimeca/Fontana/Oldani/Suzuki drums), they're pretty stiff and solid on the front axle. had Vin managed that with its wheel config/design it probably would've been a good stopper.
no intended harm/insinuation, just speaking out loud.
note: the 8" 4LS is a really nice piece of kit with matching cosmetic looks, and plug-n-play.