It depends on how comfortable business is. if they are ok with creating two separate vendors for the same party, it should be fine. In my projects, I have always seen a single vendor being maintained for each party. This avoids duplicity of invoices, avoids wrong transaction being booked and since you will be needed to submit with holding tax returns from system, it helps to have just a single vendor.
In my view, you should have a single vendor.
Regards
Sanil Bhandari