Yes, absolute mirror.
I have the package which provides me with selected Sky channels - which is quite a good bargain, if you can wrench yourself away from the few Sky channels that BT DON'T offer
Should you have the "BT multiroom offering" and subscribe to the Sky additions, you do of course have to be hard-wired to your router/hub to get the extra programmes: no wireless to date, unfortunately.
I use 2 x YouView boxes, and on old BT Vision box (cheap on eBay) which allows me to use it as a "Freeview" recorder.
No problems at all - recommended.
You do, however, need Infinity or a very good (high) ADSL connection!
Hope this helps. Les