it's not the same, if you use mainchain coins you leave a print that if don't poorly can lead to other knowing more about how much bitcoin you have as Lyn did it, nobody can know how much bitcoin she has or make any connection to her. we all know it was her because she said it publicly on twitter, but had it been a private conversation nobody outside the sender and receiver would have known that Lyn send it. On the other hand the recipient has little privacy, but well that was his choice xD