I haven't a clue which one is built better but going on past experience, my ps4 is still running perfectly and I've had it since 2013. I've owned all other PS console and each have worked with no issue for 7+ years.

I've had my ps5 since launch and as expected it works perfectly.

I once owned an xbox 360 and it lasted 1 year before it had that red ring of death thingie.