One remarkable aspect "Missiles alley" is ALL Missile detect DDG-87 Mason but not DDG-94 Nitze.
They are both DDG-51 class Flight IIA
Is here is any difference between the ships?

Yes and very BIG!

USS Mason have AEGIS Radar SPY-1D,old variant for Blue Water warfare.

But USS Nitze have already Radar SPY-1D(V),new variant with GREATLY Improved LITTORAL Capabilities-Improved Clutter rejection,additional MTI Waveform and increase transmitter power etc.

Think about it.