Different, but you'd still get a sense. I'd think you could go with a more powerful magnet on your fingertip than implanted within it too. So you could end up more sensitive in some ways...
When my magnet responds to something, it feels like I am responding to something. I don't feel a sense of separation from the magnet.
That being said, supergluing a magnet to a finger is probably the closest one can get without getting the actual procedure. Which obviously isn't for everyone, heh.