both upgrades make no sense at all. There´s barely any difference on all 3 phones. Try to get a Xiaomi 15T Pro for a good price - that would be a noticable upgrade with its very strong processor and the way better cameras. Otherwise save the money and keep the Note 13 Pro Plus for another 2 or 3 years. Then you might notice a difference on a new Redmi Note 17 or 18 then.

I've been waiting for the release of the Xiaomi Redmi Note 15 pro plus 5G with eager anticipation, but nobody seems to have any idea when it will actually be released in Europe, nor what price tag it will carry.
I'm currently using the Redmi Note 13 pro plus 5G and had been hoping to upgrade to the 15.
Question: Is it worth waiting for the 15 or should I maybe upgrade to the 14 pro plus 5G as it's available in Spain at a good price?
I'd love to hear your opinion(s). Thanks.