I've done some flights on AY A350s in J - I agree, it's not the greatest product around, but then again, either one is going to Finland or booking b/o of the low prices. Am I correct or not? I tend to think AY are fine - it's not SQ though.
Then again, I would pay a premium to fly with AY vs. BA, other things being equal. I appreciate BA can be a good option if one wants a non-stop from London or wants to get those miles (Avios?). As for the BA long-haul product / service - hmmm, I'm not a keen fan. Also would rather not connect at LHR, if it can be avoided.
787 vs. A350. Doesn't that depend on the cabin config or have I misunderstood something?