Two active I-140's with the same PD?

[permaudit]

Hi - I have an I-140 Approved under EB2 with Employer A. I am being offered with another employment with Company B and they are ready to file the GC under EB3. If the new employer applies under EB-3 and uses the same PD. What will happen to by EB2 I-140 with Company A, if they do not withdraw the petition? Company A is a small company and they are willing to keep the position open for me if I plan to come back when the PD is current.

Can I have both the EB2 and EB3 I-140's with the same Priority Date?

Insights appreciated.