Apple

It all depends on the price and condition.

The 12 Pro models have 6GB RAM (the non-Pro 12 has 4GB) and a processor that's modern enough to give many years of high performance service. And the triple camera setup is great.

Obviously each year the new models add more features and performance, but that adds more cost. And it's about getting a balance between the two.

I just got a like-new 12 Pro 256 with a brand new genuine Apple battery, and I paid less than £400. The equivalent 15 Pro 256 would cost £1100, so my new phone was around 1/3 the price of a new 15 Pro 256, but is way more than 1/3 the phone. And it should easily last 5 years.

But everyone makes different choices and has different needs. A 13 Pro or 14 Pro would be better, faster, 120hz display, etc. but they would be more expensive. And it's about finding the right balance for you

Only you can make the right decision. Compare specs and prices and make an informed choice.