Not at all
They were both designed for the games that were around in 2011?
No I wouldn't - 8 year old tech is 8 years old, things have moved on in the PC world. If you want a fixed platform for gaming that only needs updating every 5 years or so then you absolutely should buy a console.
Because when you invested in a high end PC in 2011, the graphics capability was hugely better than the equivalent console at the time (XBox 360), You would have been playing at 1080P Max settings, vs a console that managed at best 720P.
The point of spending "all that money" is to get a better experience now - longevity isn't guaranteed. If all you want is console quality graphics, then there was no need to spend all that money - it could have been done at the time for much less.