What does it matter? I flew years as an FO with an SIC type. The FOs at my company are now typed. No difference in their capabilities or duties.

Unless one desires to become an expat, an FO is still an FO, type or not.

I'd say the quality of training matters most. Done in house vs. farmed out. The experience level of the ground instructors ( time in type) and line instructors is what matters most.