I can't think of an example where we would say 'it's the same to me.' The closest is 'it's all the same to me' . This is said usually with a somewhat indifferent tone, to mean I really don't care one way or the other, or I don't care what you do. 'It's the same for me' is said to indicate that you share the feelings of the other person. "As soon as I know summer is coming, I get so excited about being able to go to the beach" - 'It's the same for me' - or, 'I feel the same way' - or, more probably, 'me too'. And sorry, I don't do hilarious or fabulous, just sensible and useful, hopefully!

I will try my best to answer. I think they can both be used interchangeably, but "it's the same for me" would sound more natural. I really can't think of an example for "its the same to me" haha just don't use that I guess. Example for correct way: Raja: Wow, the Wifi here sucks! My video is not loading!! Is your wifi going slow aswell? Toshi: Yeah, it's the same for me.