Welcome to the forum!
You really can't tell by the looks of the seat.
If you want one to really coddle your backside and you're not leaning forward at all, I had one of these that was pretty good. Only problem is that the butt support is so wide that it can chafe the back of your thighs as you pedal:
You have to be careful with how you mount and dismount it though; because it is so wide, when you put your weight on the very edge, it applies a lot of leverage to the mounting point.
The one that I really like and have bought two of us this one:
It has a good mixture of good cushion, a bit of ventilation in the middle and no pressure points in the prostate area.
It would not be a good seat for something leaned forward; it's more for an upright style bike. I think you Aventons would be good for it.
I have an Aventon Level.2 myself and I find the stock seat is just OK.
As for the suspension, I bought a Suntour NCX post for my Level.2. (I was OK with the stock seat for my rides of under an hour, but my butt is only 47 years old.
) This is a nice one and is a good compromise between the super expensive $300 ones and the cheap, short ones. It uses a cantilever design in which there is a long spring that goes down into the post, rather than cramming it all into a 2" section of shock absorber:
We hope you stick around and join the community, rather than just get a quick answer and off you go. Share your experiences and some pictures, then mentor the next generation of eBike newbies!