IMHO there ARE very scary similarities.
I have my own theories on this, after that A300-600 crash out of New York, and remembering what we used to find on A checks in New York on our A300-600 which was operating in exactly the same environment as the American A300-600, and in a very similar environment to the Air Transat A310.
I have mentioned my concerns before somewhere else, and they were ridiculed by "experts" in composite technology.
However these incidents convince me even more of the "possible" dangers with water ingress into these composites.
Water is trapped in the tails of these Airbuses operating throughout the Caribbean, freezing and thawing on each flight, and I fear it must affect the integrity of these composites.