does the exact parts matter that much?
will it affect performance or lifespan of my pc components?
Some parts are more reliable than others. Things like HDDs and RAM sticks can die out at any second or never die in the whole life span of you owning it. Also they dont specify what PSU is in either build which can also fry the components if they cheap out. But since in general both build are good performance builds I doubt the PSU would be too bad.