Why not use ≲ and ≳ or ⪅ and ⪆, which are all valid infix comparison operators in Julia?
I suppose you mean binary operators and not just “functions” — binary operators in Julia can’t be arbitrary combinations of symbols, but you have a huge list of Unicode operators to choose from — far more than in any other mainstream language — and can additionally suffix them in various ways (e.g. <ᵃ and <′). See also this issue on custom infix operators.