Try the search button, these bikes have been discussed extensively in the forums.
I think , at least regarding free design, the Sport looks more like the Core 5 but feature wise it's more similar the other 2. I was looking at all 3 but chose the 700 but that's just my choice.
The only real issue I've had with the 700 is some noise from the rear spokes. That could be weight dependent as I'm 225lbs and it only happens when applying throttle from a standstill or at low speed. I assume the sudden torque applied by the motor to the spokes combined with trying to move the weight does it. Has never happened using PAS or if I pick the rear up holding the rack and hit the throttle it's fine. I've tightened them and checked with a tension meter. It happens less and less often, if I hear it I check each spoke by hand and snug any that feels looser than the others a smidgeI finally bought Ride1up 700- I am happy!
Reasons: Can use Throttle without pedaling unlike Aventon. I agree with @BigNerd. Helps a lot in Traffic stop, steep hill. Helps me to explore the city! Personal choice. I have a regular bike for exercise. I use ebike for commute, shop, cruise around. Ride1up assembly was easier than IKEA products
