No, this is not the same. After you login, but before clicking on the green button for "Sinya Arda" (which loads server US6), you should click on the red button for "Felyndral" (which will redirect you to US3). If you start a city on US3, you can meet your wife there and join her fellowship. Next time you login, you will see two green buttons, one for Felyndral and one for Sinya Arda. If you wish, you can send a ticket to support to have them delete the city on Sinya Arda. It's unfortunate that we still can't choose which server we start on, but this is the workaround
Edit: PS it could be that you first have to complete the tutorial on US6 before you are able to go back to the login screen to choose US3 instead!