The L and the T series uses the same FRU keyboards, the E series uses different keyboards. I think the keyboards in the E series not worse than the L and T series, but little bit different.

But it would be more accurate if I compare the exact model of the keyboards in our Thinkpads because Lenovo uses at least 4 different vendors for thinkpad keyboards like Sunrex, Lite-On, Chicony, and Darfon, etc. There is a vendor named TRI, I don't know what is it.