I have only ridden the Vado but...
I’d say there is big difference between Vado and Como when it comes to frame geometry and seating position.
The Como offers a noticeably more upright seating position.
You get wider tires (on smaller rims) that should offer a more comfortable ride. The Vado has a suspension fork though.
The difference between 2.0 and 3.0 is in gearing and brakes and maybe also fenders, rack and lighting.
I really can’t say how much better the 10 speed Deore is vs the 9 speed Alivio but you get a ”lower lowest gear” with a 10 speed 11-42 compared to the 9 speed 11-36. Most modern gear shifts work fine as long as they are well adjusted.
I must admit though that I choose my Vado 4.0 ( 11 speed) over the 2.0 because of equipment level.
In the US the Vado and Como 3.0 are sometimes sold as 28mph bikes but I don!t think they were really meant for that initially. ( the 40 teeth crank is a bit small for 28mph)
There may be a slightly larger battery on the 3.0 (504Wh vs 460Wh) but I’m not sure about that.