Is this different from/better than? unums: https://en.wikipedia.org/wiki/Unum_(number_format) https://en.wikipedia.org/wiki/Unum_(number_format) interval arit

Is this different from/better than? unums: https://en.wikipedia.org/wiki/Unum_(number_format) https://en.wikipedia.org/wiki/Unum_(number_format) interval arithmetic: https://en.wikipedia.org/wiki/Interval_arithmetic https://en.wikipedia.org/wiki/Interval_arithmetic