So here are the Adhoc results from my FlexKeyhole.
~45mm x 18mm
- NFC Nail
- T5577 15mm Disc ( Aliexpress )
- SLIX ISO15693 ( Aliexpress )
The testing differences were negligible if any at all, The only exception was the NFC nail range decreased when lying perpendicular to the SLIX antenna.
LED Nail standalone
~12mm with my phone Galaxy S9
30mm Proxmark RDV4 factory HF antenna
LED Nail Keyhole
~12mm with my phone Galaxy S9
30mm Proxmark RDV4 factory HF antenna parallel
20mm Proxmark RDV4 factory HF antenna perpendicular
FlexEM Standalone
~15mm
FlexEM Keyhole
~15mm
HF SLX ISO15693 Standalone
~15mm
HF SLX ISO15693 Keyhole
~15mm
Hopefully Amal finds this interesting enough to do some proper testing when he has some LAB time.