Fibre and cable both get advertised with the same big speed number, so it's easy to think the difference is marketing. It isn't. The real difference shows up in the moments the speed number doesn't cover.
Cable shares a line with your neighbourhood
Cable internet runs on infrastructure that's shared with everyone nearby. At 2pm, that might not matter. At 8pm — when your whole street is home, streaming, and gaming at once — that shared line is exactly why cable connections tend to slow down during peak hours, even if your plan says otherwise.
Fibre doesn't have that problem
Fibre-optic lines carry data as light, on a dedicated connection to your home. The speed you're quoted is a lot closer to the speed you actually get, at any hour, because you're not splitting bandwidth with the block.
Upload speed is the quiet difference
Cable plans are usually built around fast downloads and much slower uploads — fine for watching video, less fine for video calls, uploading files, or anything where you're sending data out, not just pulling it in. Fibre connections are typically symmetrical: upload and download speeds that actually match.
What this means day to day
If your household is mostly one or two people browsing and streaming, you may never notice a difference. If you've got multiple people on video calls, gaming, or working from home at the same time — especially in the evening — fibre is where the "why does this always slow down at night" problem tends to disappear.
Where oxio fits into this
oxio's network is fibre-powered FTTN — fibre optic for most of the run, then coaxial cable for the last stretch into your home. It's not a from-scratch fibre line to your door, but it's also not the same shared setup that makes traditional cable slow down at 8pm: the fibre backbone is what keeps the number you're quoted close to the number you actually get. The speed number on the box was never the whole story. What happens when everyone's home is, and it's worth checking what's actually carrying your connection before you renew.