I visit vs I'm visiting

Hello there.

These sentences are both correct?
Any difference?

(a) I don't have any plans for this Sunday, but next Sunday I am visiting my aunt.

(b) I don't have any plans for this Sunday, but next Sunday I visit my aunt.

Please help me!

Hi gchman

(a) I don't have any plans for this Sunday, but next Sunday I am (planning on) visiting my aunt. :tick:

(b) I don't have any plans for this Sunday, but next Sunday I will (definitely) visit my aunt. :tick:

No, Soup - that changes the sentences. The difference is between:
I don't have any plans for this Sunday, but next Sunday I am visiting my aunt.
(Not, 'am planning on visiting'..., which shifts the time frame.)
and
(b) I don't have any plans for this Sunday, but next Sunday I visit my aunt.

(I will visit is a difference tense form).