It is not always the airports that have different policies it is often the handling agents interpretations . This is why sometimes you have to stand your ground when checking in your bikes. Whenever I am flying with bikes I pack the bike according to the airlines instructions and take a printed copy of their policy with me.
Often we have come across confusing anomalies. At Gibraltar and again at Bordeaux we were asked not to bag up the bikes but just let the handlers wheel them to the plane, exactly as we rode them into the airport. Ryanair from Nimes took my bike with bars turned and pedals removed, no bagging, yet the same airline out of UK insists and them being boxed. EVA Air wanted bikes in bags out to Bangkok but were happy just to take them as they were for the return trip. So it really is a minefield.
I haven't done any other blogs on the subject, personally I think there are too many online, this one was only done in response to being asked many questions about wintering in Mallorca. If you have anything specific I can answer either post here or pm me.