You mean 10 AMRAAM? But if the C has better acceleration and climb rate, which means more range for its AIM-120s, then why is it at 13.7 even if no AESA? AESA would be important for longer ranges to guide in something like AIM-174, but the current radars are sufficient.
Even though they are sidegrades mostly and both would likely be mid at 13.7 already, but I think Gaijin will artificially make the 18E 14.0 because “Muh letter E is after letter C”. the 18E will be an okay 13.7, but will likely be among the worst 14.0 if stuck with 120A/B and 9Ms.
Just like how vehicles like the Ariete AMV are artificially the same BR as the 2A7HU, even though these 2 have no business being at the same BR.