@jeder you get one smaller but still decently sized cabin bag even in that, good enough for a few day trip, even with a bigger bag allowance, it's still less than the flixbus
@jeder also there is virtually no flexibility with flixbus, this is not even a daily connection, i had to go quite a few days ahead to find one which is not sold out, it's very few seats, if you would need it sooner or on a specific date, you just like... can't, it's not like you can just go and get more expensive airline or something, you just won't have the bus option (unless you're willing to do two transfers during the dead of night anywhere randomly in europe)