SF Cremona (first series) - Mid Range

Happy New Year

I have got a problem with one of my Cremona midrange (not the mid-woofer), that stopped working (tested: no continuity). I managed to remove it from the cabinet using the suggestions that I found in an old post (great stuff!). I have a couple of questions though:
1. There are two 4 Ohm Scan Speak possible replacements for the Mid Range:
(a) 15M/4531K (b) 15W/4531K
The physical measurements are the same as the Cremona driver; however, the frequency response are indeed different with the 15M being about 3dB more sensitive.
https://doc.soundimports.nl/pdf/brands/Scan-Speak/15M4531K00/15m-4531k00-data-sheet.pdf
https://doc.soundimports.nl/pdf/brands/Scan-Speak/15W4531G00/pdf_Scan-Speak_15W4531G00_1.pdf
Am I correct to infer that the driver used by SF is the 15M?

2. In old articles and marketing material, one reads that there has been some "customization" done by SF in Italy. However, details are a bit vague... I get the feeling that in reality, for the first series at least, SF customized/adapted the cross-over to these Scan-Speak drivers? These drivers really look identical... Anybody here knows the truth?

Thanks in advance!
Andy