She is concerned about bike weight. Obviously, the motor would normally be making that pretty irrelevant, but the nightmare scenario would be to run out of battery power on the wrong side of a huge hill. Weight would be a slight issue getting the bike on and off trains and over the small step in and out of her house. IMO 23 kg is not a showstopper weight. I have wheeled some bikes weighing well over 30 kg and they felt damn heavy to me, and I am a 6' 1"/ 14 stone man. That kind of thing would be way too heavy, but I haven't looked at many bikes over 24-25 kg.
TBH though, 64 kg rider + 3 kg of extra stuff (tools, food, drink, jacket etc.) + 23 kg bike is only about 8% heavier than 64 + 3 + 16.5. If I were choosing a bike for myself, I would rather have 16.5 kg than 23 kg, but I would rather have more battery than I needed than less than I needed otherwise I wouldn't bother with an ebike in the first place!
The Juicy lift would appeal on weight, but not so much on range and price.
I liked the look of the Whoosh Faro and it was more in my pal's price range. I know that the internal battery is fairly limited but it would probably do for shortish local hilly rides. (Range?) I read that there might be an option for adding an external battery later, but then we would be back with pricier and heavier so going straight for the Rambla would have made more sense.
I saw a few bikes at £1,500+ that looked interesting but my friend is reluctant to spend that much.
Availability is a factor too. I don't know what timescale my friend is thinking of for her purchase but I doubt that she will ride in the winter so she'd want to buy sooner rather than later.
Oh, the other thing that I forgot to mention is that she hates pedalling quickly. I have ridden up moderate climbs with her on her unassisted bike but she normally hops off at the first sign of a steep ramp. I tell her that she hasn't even bothered to use the smallest ring on the triple and she tells me that she hates the feeling of her legs whizzing round and hardly making any progress. She'd probably want to be pedalling an ebike at 40-60 rpm so that would have to be taken into account with torque, motor noise etc.