Yeah, beech bark disease was actually introduced from Europe, to Halifax in the late 1800's. (well, i should say, the insect part was. The mechanism is that the scale insect creates an opening for the native-to-North America fungi in the Nectria genus to infect the bark). So the disease has been around in Europe (with local Nectria infecting) for much longer and my understanding was that European beech has better defenses and was more resistant, thought not entirely unaffected.
Not super up on the leaf disease, but it does appear that European beech can be as well.
Not super up on the leaf disease, but it does appear that European beech can be as well.