I have been unable to confirm if you are now able to pay onboard trams and buses with just a cc/pin
Yes that is possible, but which cc you can use depends on the transport company. Not all companies will accept the same cc's
I am confused though on what they charge if you use cc. It seems it may be the single ticket price of 6, instead of what the OVC would charge.
When you use a cc (or debit card) you pay the same as when you paid using cash. The fare for a single or a day ticket differs per region and per transport company.
Maybe you only get the lower fare with the OVC?
The lower fare (check via 9292.nl) is only applicable to anonymous and personal ov-chipcards, not to disposable ov-chipcards.
So it all depends on where you want to travel.