Ah, I thought that was only a launch offer. I didn't realise they were still doing it.
I don't have Sky Q, but I would like to think it's the same content that you get online. (There again, look at the difference between the Eurosport content on the On Demand section of Sky+HD, and the content on the Eurosport Player).
However, from what I have picked up, Discovery+ is not like some of the other services on Sky Q (e.g. Disney+, Netflix), where you can have one account that covers both viewing on Sky and viewing on the computer / mobile/ etc. If you take up the 12 month free offer on Sky, then you can only view Discovery+ via Sky. If you want to view Discovery+ on other devices, you still have to pay the £60 per year / £7 per month. And if you do that, I don't know what happens when the 12 months on Sky ends. Can you then link Sky to your online account?
But, that is only my interpretration of what I have read. I may be completely wrong.
Whatever the case, that we are having this discussion confirms what I said before about Discovery+. They were in too big a rush to launch it, and did not think everything through properly. And it has resulted in all this unnecessary confusion.
CaroLiza_fan