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Maybe, but I think the lever determines how much fluid is pushed, and the bore difference is so tiny as to have virtually no effect. Just my understanding. Blind taste tests required.
Scrabble-
As long as it all seals OK, you're fine. Best to match the hose with the barb, but if it works, it works.
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They both pretty much work fine together in practice
That's what I was saying innit. Match the barb and host though, or it'll be too tight or too loose depending on which way you're not matching.
Brommers
snottyotter
They both pretty much work fine together in practice, but shimano says to use the right ones, BH90 has a thinner bore than BH59 for whatever reasons they deem best, pushing less volume of fluid through further or something, silver barb for 90, brass for 59. Generally the higher end stuff has had BH90 but that has basically trickled down through almost the whole range.