I am trying once and for all straighten out all these X's and E's on the A330 and A340 families. I have used three website aircraft listing websites, planespotters.net, airfleets.net and ch-aviation.ch.
So far all three websites are coherent on the
A340-500/A340-500 HGW (X)
A340-600/ A340-600 HGW (X)
The confusing part is the A340-300 and A330-300. All three websites list different versions of the model for the same aircraft (reg).
For instance on ch-aviation.ch one aircraft might be listed as A340-300E while on planespotters.net it might be listed as the A340-300X. There are several other cases like this. It seems that planespotters.net doesnt list any models as the E version while they do so on ch-aviation and so on.
Now, is the A330-300/A340-300 E and X designations interchangeable, if not which website is correct? Are there any better aircraft fleet listing websites?
Furthermore, is there only one version of the A332, or does it also have the X/E versions?
Any help into this matter is appreciated. Trying to complete my flight log by knowing which of the models I have flown, whether they are the original/X/E version and which ones I have yet to fly.