Ah right lol. Declan the best way is to look at your miles per kilowatt and multiply by the battery capacity.
3.8 mpkw x 73 (battery capacity) = 278 miles of range.
3.3 mpkw x 73 = 241 miles of range.
The 3.3 really does sound like it’s weather/time of year related. Wipers, lights, heating, demisting etc. I’d say that’s about right for a car this size.
As others have said. The GOM is and indicator only and can be very unreliable. It will come to you soon enough. I’ve run both cars from 100% to near zero so I know what’s in reserve and the Kona was similar to the e3008.
When range digits disappear and it’s just bars, I can get 12 mile of driving at around 60mph, when turtle mode kicks in I can get around 2 mile of speeds no higher than 50, then after about 2 miles I can get at least 1 mile no higher than 25mph. That’s when I thought I’ll not push it too far and charged it up. That is with with everything off that can be off.
I only done this so I know if I get caught out then I know what’s in reserve and will get me to either a charger or home to charge.