The first one, the FX 6300, is obsolete. You can work on it, but you will have a bad time. Old processor.
The second (Ryzen 2700 + RX 580) and third one (i7 8700 + GTX 1060) are great, and both have SSD + a good HDD (2tb on one computer and 1tb on the another one), and also 16GB of RAM. However, the Ryzen computer come with a RX 580 8GB Vram version, the i7 come with and GTX 1060, with 3gb Vram version. I would buy the second computer because of that, the amount of video card RAM on that RX 580 is more than on that GTX 1060.
If money isn’t a problem, you can consider to buy at least an RTX 2060 or an RTX 2070, because you will be able to work with Ray Tracing.
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If you don’t want to work with Ray Tracing, the Ryzen 2700 + RX 580 8gb version + 16gb RAM + 240gb SSD + 2TB HDD computer of your second post will be really great.
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If you** want** to work with Ray Tracing, an Ryzen 2700 (or i7 8700) + RTX 2060, or 2070 + 16gb RAM + 240gb SSD + 2TB HDD will be good.