MW far distance (DX) Test Tecsun PL-360 vs PL-747

At Corfu Greece tested 9/10/20 about 12:30 UTC time when was a complete DC at all the area (so no interference/noise should be preset) Tecsun pl-360 vs Tecsun pl-747 a rare radio i still have since about 2003 (from ex-Maplin Electronics when i was in UK to hear voice of Greece at time at SW band) Tested at 684 && 630 khz seems is RTT Radio Nationale (Tunisia) at both freq (both have same speaking & Tunisia is the only one to have transmissions at these both freqs) that is about 900 km or 500+ miles far Both getting the same, just the pl-360 needs earphones to understand better at the 684 khz perhaps because has smaller speaker ... other way i would say both are same... Note this test is during day time, night time both have stronger signal, just day time at MW band is way less