I had a 3D Land streetpass today with someone who actually has the game instead of just another 3ds owner. So here's the difference, when you streetpass someone who only has a 3ds you get toad's house and mystery boxes. When you streetpass someone who has the game also you get the same things plus their best time for each level. I streetpassed a mii named Jamila who just got the 3ds very recently probably with 3D Land. I beat her time in every level!
Edit: Apparently you don't get rival time data for every level. Oddly I have some rival times for world 3 yet a few levels are missing rival times in world 1 and 2 even though you need to beat some of those levels to advance. Maybe all the data didn't transfer or something?
Edit: Apparently you don't get rival time data for every level. Oddly I have some rival times for world 3 yet a few levels are missing rival times in world 1 and 2 even though you need to beat some of those levels to advance. Maybe all the data didn't transfer or something?