Joanna Trollope's modern day version of the classic Sense & Sensibility is, like I said, MODERN. It is not going to be the same as Austen's as the times have changed a great deal since the 1800's. If this is going to bother you, then I don't suggest you read it. You'll be sitting there, comparing, contrasting, driving yourself mad. If you would like to experience a modern take on the classic tale, with characters that are very similar to the original cast personality wise, and great writing, then you should give it a try. The premise is the same, three sisters who are mildly bratty are to be watched over by their half-brother and his wife after their father dies. And the half-brother's wife wants nothing to do with them.
I mean if there is a book that has Elinor, Marianne and Margaret checking Facebook, I want to read it. Just for fun. And what fun it is.