Is there any difference between Tamagotchi Version 4 and 4.5? Besides from the games, I mean. Also, can V4 and V4.5 still connect with each other and have game, present, and visit as a option? Or do you have to choose other for V4 and V4.5 to connect? I've had Tamagotchis for a long time, but I'm thinking about getting V4.5, so I was wondering. I have V1, V2, V3, and V4.