The difference here is the EQ.I think 35" scale can make the B string feel slightly nicer to play, but it doesn't automatically provide better tone when amplified. I have a 35" scale Lakland Skyline and a 34" scale Stingray, and both have a nice sounding B string - the 35 does not sound better than the 34.
Something I like about both of these instruments is that their B strings sound good higher up the neck: a B string isn't just about all low notes all the time.
I personally find that bridge pickups work better for low tunings because the are where the string is tighter and have more of mid focus. If the Lakland is a 55-02 or 44-02, if you pan to the back pickup, it will sound exactly like a Stingray.
The 35" scale provides more tension to the string, giving it more articulation. If all you want is a low fundamental, or use especially stiff strings, it isn't as important, but for a someone please quick and heavy like me, 34" scale basses sound like a mess. The B is muddy and flops around like a dead fish.