Silvercross Alpha vs Zorin Blitz: who would win?

Too close to call

Silvercross Alpha · Toaru Majutsu no Index · Base

Tier: 9-B
Attack Potency: Wall Level
Speed: Subsonic
Durability: Street Level, up to Wall Level

Zorin Blitz · Hellsing · Base

Tier: 9-B
Attack Potency: Wall Level
Speed: Unknown
Durability: Wall Level

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