Can I use the MBE cards for the UBE?

Yes. In fact, you should use the MBE cards for the UBE because the MBE is a component of the UBE.

Specifically, the Uniform Bar Examination (UBE) is composed of the Multistate Essay Examination (MEE), two Multistate Performance Test (MPT) tasks, and the Multistate Bar Examination (MBE). The MBE is widely considered the most difficult portion of the UBE.