Tuyet vs Sphinx (Re:Zero): who would win?

Tuyet favored — Slight edge (~55%)

Tuyet · Bionicle · with Nui Stone

Tier

6-C, up to HIGH 5-A

Attack Potency

Island Level, up to Brown Dwarf Level

Speed

Massively Hypersonic+, up to Relativistic

Durability

City Level+

Sphinx (Re:Zero) · Re:Zero kara Hajimeru Isekai Seikatsu · Arc 8 (The Witch of Greed)

Tier

6-C

Attack Potency

Island Level

Speed

Supersonic, up to Speed Of Light

Durability

City Level, up to Island Level

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