Okay this endless comparison is not going to be productive for anyone, so putting down some of the points you mentioned here, that we’ll definitely take as feedback:
- Center stand
- Brake lock when parking on slopes
- Better quality panels
- Pillion footrest
- More range
- Better rear view mirrors
- More color choices (with 450X, you’ll have 3 more colors to choose from)
- Improve fit and finish
- Simpler dashboard that’s more intuitive
- USB charging port (I’m guessing this is what you mean by mobile charger, since there’s a portable charger available for purchase)
- Theft and Tow Detection (Upcoming feature through an Over The Air Update)
- Better Range (Range figures shown on the dashboard is what we call TrueRange, and accurately represents what you’d get on road. A lot of our owners, depending on the riding style, get a variety of range. You can check out https://forum.atherenergy.com/t/mileage-archives/1234/1 )
Rest of the points about design etc are subjective and totally your preference.
Some of these are already feedback suggested, and the teams are working on improving this in future models. We’d love to hear from you, if there’s anything else we can take as feedback, to improve future products 
Either way, we’re glad you’re choosing an electric vehicle, and taking a step towards more EVs on road.