one difference i've already noticed between limebike scooters and bird is in the scooters themselves.

limebike scooters' bells are on a flimsy spring so most of the time theyre broken. the bell is pretty useful for alerting walkers ahead of you of your presence without having to yell.

the bird scooters are also able to 'chirp' to help locate them - i've heard limebikes do the same but i have not been able to find that feature in their app.

overall i dont think this is an issue of a winner take all market - uber and lyft seem to live in harmony and i take whichever is cheaper. for scooters, i'd just take whichever one is closer, there is no brand loyalty or much differentiation but there's room for multiple players atm.