Diavolo doesn't have any canonical statements comparing him to the SoL
He's actually said to be among the fastest of all stands but sure.
Best thing you can get for KC and Diavolo is maybe Supersonic due to Mista's bullets
Ignoring how Mista's bullets get accelerated far beyond basic bullet speed when redirected (Most obvious example is Kraftwerk, where kicking the bullet actively caused it to get a burst of speed beyond the standard velocity), him deflecting that shit would be easy MHS even if they only were basic. The fact he upscales off of Chariot, and a **** ton of other Stands from the same part that treats automatic machinegun fire like dogshit says a lot, Little Feet for example is easily High Hypersonic just based off Aerosmith. Thinking on it, could probably cook something up for explosions too for Part 5.
SP is supposed to be the top dog of the verse, and KC is like a "maybe he's up there" with the whole first-class speed
Funnily enough, the very same the very same source that lists that for King Crimson's stats, also uses the exact same kanji when talking about Plat's. The only two in the guide described like that. To be FTL, you don't need to surpass Plat, just being in the same ballpark puts you above several SOL Stands.
It's unlikely that GER is unquantifiably faster than King Crimson, because Diavolo could still foresee his Stand punching a hole through Giorno when he received a vision of how their fight would turn out.
Blatantly incorrect.
Diavolo explicitly says he
couldn't see it, and the
ONLY reason he dodged, was because he saw the hole spontaneously appear in his hand within the vision, as in, he didn't react to GER, he reacted to the damage said attack he couldn't react to caused, and proceeded to actively dodge ahead of time. Guides confirm this saying "not even the super-speed King Crimson can perceive his attacks".
GER 100% absolutely raw dogs the **** out of King Crimson to the point it isn't even funny, there is no "unlikely", he is both stated, shown and straight up is unquantifiably far beyond him.
All this withstanding, this isn't Infinite wtf, it's just "dude is so fast he blitzed other dude", it was a hefty blitz yeah, before the punch could even land, he vanished and moved behind him like 5~ meters. But that's all it is, a blitz, as one would expect from the god tier of the verse.