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I have never seen a ceramic offer more scratch protection. My friend who is a opti-coat installer will also attest to this.
Coating will shed and resist dirt and contamination from sticking to the paint. An easier car to clean = a car you are less likely to scratch.
Majority of pro grade ceramic coatings that offer longer warranties require yearly maintenance return visits.
Sio2 sits on top of the paint and then layers are added to get the desired amount of durability. The layers will wear over time, and maintenance will help boost the layers to keep the coating alive.
Then there are brands like optimum who use a slightly different formula for their pro line opti-coat which is SIC based, not Sio2. Their compound actually bonds with your clear coat. In theory it is a lifetime coating but like anything the hydrophobics are dictated by wash maintenance.
You can actually treat the coating like paint, and use clay and iron removers on it which is something you wouldn't do with majority of coatings on the market.
For a daily I don't see as much value in a long term coating if you care about removing scratches, nicks etc as the car ages. Unless you are happy to pay for panels to be recoated as needed.
The 3M PPF has held up great overall on my car, but it is still a wear item. It has seen 100k km/4Y abuse with winters. The bumper is the area that gets hammered the most.
My hood, fender and mirror caps film is still in great condition, the bumper needs to be redone, or removed.
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