All range and speed figures quoted are as supplied by the manufacturers. These figures will be in ideal test conditions and with settings set in order to provide the maximum figures: so a warm day, a dry road, lightweight rider, no inclines, cruise control on and lowest speed setting.
The figures you will achieve in reality will vary. Most people will ride with undulations, most rides will involve stopping and starting and accelerating from a stop, 99% or riders will also switch to the fastest speed setting and never use the lower speed settings - and 25° in the UK, that would be nice.
The maximum speed and range figures aren't just down to the e-scooter/e-bike and the conditions, the weight and height of the rider will also affect the results. So when an e-scooter/e-bike is advertised as having certain figures it doesn't mean there is something wrong with the e-scooter or e-bike if you don't obtain these figures. As a rough rule there will be little difference in figures between different e-scooters,/e-bikes that have the same specification.
Based on actual tests by reviewers and industry experts a "real life" range figures for e-scooters can be estimated at around 50-70% of the manufacturer's figures.
When comparing e-scooters/e-bikes don't just make your buying decision based on the figures. If two e-scooters/e-bikes have the same motor and same battery then even if different brands the range is going to be similar, (despite what the manufacture's figures claim).
If comparing e-scooters/e-bikes and one has a larger Ah battery rating and the motor is the same then the scooter with a larger Ah rating should have a greater range.