I have test rode 2 of them so far, One of the bike I'll never test ride, as it's a 4 hour drive. The 11ah battery is promising up to 60 miles range, with a 2 year warranty, test riding that this week.
The Oxygen bike looks great to, wil hopefully ride that this weekend.
Forget the 60 miles out of a 11ah battery because it depend on your weight what you are carrying terrain you could get 60 miles out of it but you won't know that until you have been on that first ride and find out
if i was been honest with you cannot make your mind up until you have tested ridden them all because for example you might not like the feel
to one at all pretty much impossible to advise until you have ridden them
i do have a 11ah battery and i am lucky to get 30 miles out of my battery
but i don't have the terrain like everyone else has it depends on so many factors
For a example i pull a trailer with me too so i am going to get lot less miles too
The only way you can treat it like a questionnaire what ticks your boxes what doesn't tick your boxes
The Oxygen might look great but you might think it rides awful and you don't like the motor settings when you are pedaling it is all unknown till you have that personal experience with the bike
its like a bicycle saddle what is right for one person could be completely wrong for someone else buy what is right for you and what suits your purpose
When i was looking to buying my first e-bike i thought i am was going to buy a "Whisper 905 Classic" and i was sold on it before i even ridden it i did get the chance to ride it and i personally thought it was the worse bike i have ever ridden it was heavy clunky and it wasn't for me
So my advice don't rush in to buying one because you might regret it and
selling e-bikes there isn't really a market for them you won't get what you paid for it