Is there any difference between what time should I expect your call and what time should I be expecting your call? For example:
Person A: I'll call you tomorrow and we'll talk about the trip.
Person B: Alright. What time should I expect your call?/What time Should I be expecting your call?
As @KateBunting said, there is no significant difference. They are two valid ways to say exactly the same thing.
As you can see in other answers, many English speakers will perceive a slight distinction, however this is really a matter of subjective (and unreliable) interpretation by the listener, and not something learners really need to concern themselves with.
If you really want to get 'into the weeds', my feeling is that although the second sentence is not in the passive voice, the use of the present continuous makes it feel like more of an indirect inquiry. This might be perceived as softening the tone of the question.
But consider this alternative:
Person A: I'll call you tomorrow and we'll talk about the trip.
Person B: Alright. What time?
This is much more likely as genuine modern spoken English, but is far more 'direct' than either of the alternatives. But nobody would ever consider it to be 'impolite'. It's simply asking for the time succinctly. There's really no need to over-complicate the situation.
OP wishes to know the difference between Sentence 1 and Sentence 2.
1.What time should I expect your call?
2.What time should I be expecting your call?
Sentence 1 -- I expect your call" is used to demand something, such as "I expect you to arrive on time," which is a stern but polite way of saying "You must arrive on time." Here, it means "You should call me."
Sentence 2 --I be expecting your call." Most typically, however, this form is used to specify when you want someone to arrive, as in "I am expecting you at five" to mean "I will be waiting for you at five.
Sentence 2 expresses the same matter more politely.
