[Conan]

Yes I did have another similarly-old AMD system, but I could not boot it up since 2 years ago. I just felt it was not worth my time troubleshooting the system and then I gave up.

Well, when we talk about longer-term reliability, a difference of several degrees can affect the actual lifetime a lot.

But yes, all depends on how you use your CPU. If you could ensure you never hit the maximum allowed temperatures, both IBM and AMD CPUs should work fine for you.

I doubt that the AMD CPU is the one which broke.

If you care about long term reliability, (as said before) you shouldn't let it reach maximum temps. Higher temps and reliability doesn't really add up.
The small difference in temperature shouldn't matter at normal operating temps.

AMD or Intel now doesn't makes sense because their next processor release with combine Intel+AMD.

now makes it Intel/AMD OR Nvidia

This is about CPUs.
Also not every Intel chip will contain AMD graphics. It's only for specific notebooks.