Thank you everyone. I am the OP. I learnt the following things from this thread
1. I am a selfish monster. I cook food at home thereby denying others green dollars to make food and sell it to me. My selfishness is causing poverty
2.
Specialized is the company which actually puts real work into customizing the system with their software and interface etc., The other 3 are using off the shelf cheapest software they can find
3. In the end my choice is
Go with Specialized. Or go with Priority 1 current if I think my perceived peace of mind is not worth 1400$ I will pay for
Turbo Vado 4.0 (Or the 5.0 IGH which is 1000$ more with belt drive and stuff)
I did find owner reviews of Priority 1 current bike motor failing within a month, and how they got it repaired from a local bike shop and Priority refunded them. In all a win win. They were able to eradicate poverty by paying a local bike dealer.
So I could be helping the society by buying priority current and giving bike shops business.
Now if I could only test drive a bike at a shop like we do a car here, that would be amazing, but for now, its going by the reviews. Most probably it will be a Priority current. But who knows what Friday brings!