Impossible to tell from that graph alone.
You can try doing nearfield, gated measurements of each speaker, then overlaying the two graphs to show unit variation.
For this, use Room EQ Wizard to export a measurement sweep as .WAV, then play it back on the Elacs (each speaker separately) and record the result with your iPhone.
Go to REW->Import->Import Sweep recording to load the measurement into REW, then apply gating according the the guide below to show the speaker's response sans room acoustics.
The closer the iPhone's mic is to the tweeter, the better the result.
Naturally, microphone distance and position must be matched as best as possible between the two speakers, for meaningful results.
No you don't need that special miniDSP mic to do this. The iPhone works just fine.