Austrian PhD without undergraduate degree?
I would argue the opposite way. An Austrian PhD definitely qualifies as PhD internationally. The former master curricula were typically composed of two parts that resemble the undergrad and graduate master studies. So in essence, in order to get an Austrian PhD, you need to pass undergraduate, graduate master and a PhD curriculum, while in American standards, you just need an undergrad + a PhD program. I don't see, why this should be worth less. Besides, the PhD curriculum is distinct from the others in both cases since it typically involves research, publications and conference or workshop presentations. So a PhD degree in one country also matches a PhD degree in another just by the competence you gained in addition to exams.

I don't have the exact comparison in terms of credit/effort or something like that. Maybe someone else can clarify.