bestandig vs. alltid
What exactly is the difference?
And are there situations when both words convey exactly the same meaning?
As adverbs meaning "always" they're interchangeable.
"Bestandig" can also be used as an adjective, meaning "resistant" or "durable".
I guess it is like beständig and immer resp. allzeit in German.
I mention that because your German Level is quiet height.
Like steady/continual/constant vs. all the time