IMO... the stage preview was welcome and something Eurosport don't do unless it's the Tour de France. Sky used their own graphics to highlight what the placings were coming back in from ad breaks. Eurosport rely entirely on the host broadcasters DOGs.
I also felt the tone taken by Sky Sports for the Little/Hammond spots was interesting - very much taking into consideration that not everyone watching would be an expert. As a contrast, Eurosport today. Me personally, I am a fan of watching racing and riding my own bike around and about when the weather's fair. I have barely missed a TV race. I am not however a tech head or a racer. Harmon's chat with Magnus was well above my knowledge of the technical side of the sport, and I don't feel I learned much. It may as well have been their mobile phone number they were talking about.
While Sky cannot control what an international feed contains, they did at least make the effort to not assume everyone watching is an expert. They explained the concept of time trials, prologues, different bikes, and how all that might or might not be relevant to an uphill TT. Today, they highlighted the likelihood of the sprint finish not being contested by the bigger sprint names.
Sink or swim is no bad thing, but I do feel with Eurosport it's that alone. With the international language of the sport being French, I personally feel certain things do need explained more. Not to me, but to people who might be watching for the first time. DH is good at doing that at the Tour, but the rest of the year I feel they're complacent about their audience.