UBS Group (UBS) is calling for better capital rules, noting that the proposal for it to back foreign units with a 90% common equity tier 1 capital is "de facto the same" as the Swiss government's suggested 100% CET1 capital, according to a FactSet transcript of remarks from UBS Chief Executive Sergio Ermotti at a Tuesday event.

The Swiss government is set to vote on new capital rules for UBS on Wednesday, according to Reuters.

Ermotti said the 90% and 100% CET1 capital has a difference of about $4 billion.