You should allways match the center channel to the L/R stage too. It is called timbre matching. Basiclly the voice audio (what a center channel is designed to do mostly) will sound very different coming from 2 different drivers at the same time. If you have say a tower with a titanium tweeter and polymica mid driver, with a silk dome tweeter and polymer composite mids… they will sound totally different.
Find the center channel in the product line your front stage came from. Dont mix and match LF/RF and Centers.