No, if you keep the package identifier the same, it is considered the same application.
In addition, on the iTunes Connect portal, you can rename your application when you submit a new version of your application. (I did this with Sefira version 2, which I renamed " Ultimate Omer 2 ".)
Just remember that your iTunes โslugโ (http://iTunes.com/apps/appname) remains with the first application name.
If you want to change the application name as it appears on the device, change the "Package Display Name" property in the plist info file.
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