Tannoy question: Can I pair a Monitor Silver with a Monitor Red?

Question for Tannoy experienced.. can I pair a 12" Monitor Silver with a 12" Monitor Red?  I have located and am able to acquire loose single driver of each and was wondering if these two can be matched together?  The Monitor Red 12" is the older Orange dust cap version.   Planning to build custom cabinets for these.  Any inputs are appreciated.  Thanks.