A Redmi note 4 HelioX20 MIUI 8 Andriod 6 or a Redmi Note 3 Pro 3GB RAM W/ Snapdragon?

Should I purchase a Xiaomi Redmi Note 4 with Helio X20 MIUI 8 with Android 6 or a Redmi Note 3 pro with Snapdragon? Even if Xiaomi releases a Note 4 with Snapdragon is there much of a difference in the 4 to wait, by chance? Seeking opinions, if I am in the wrong forum please guide me, thanks.

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