Scorpio Milo vs Neo Shocker: who would win?

Neo Shocker favored — Slight edge (~55%)

Scorpio Milo · Saint Seiya · Sanctuary Arc

Tier

4-C, up to 4-A

Attack Potency

Star Level, up to Multi-Solar System Level

Speed

Speed Of Light

Durability

Star Level, up to Multi-Solar System Level

Neo Shocker · Kamen Rider · Kaijins

Tier

HIGH 4-C

Attack Potency

Large Star Level

Speed

Unknown

Durability

Unknown

A heuristic estimate from normalized VS Battles Wiki stats: tier, attack potency, speed and durability.