Proxmark RDV4 long range HF antenna testing

The Proxmark RDV4 has loads of antennas available for it but how much extra range does the "long range" high frequency antenna give you ? You can buy your own antenna here https://lab401.com/collections/rfid-tools/products/proxmark-3-rdv4-long-range-hf-antenna-1 It seems that I managed to achieve the advertised range