It’s gonna be hard for anyone to give you detailed differences between different ceramic brands unless a pro chimes in.
I researched this extensively when I got my Model 3 in May. First off, I think unless you *really* know what you’re doing, don’t go the DIY route. One of the things that is critical for a good looking ceramic coat is totally eliminating small paint defects. Even brand new cars can have paint defects if they were washed improperly after arriving at the dealership. Since the ceramic coating bonds with the paint, any paint defects are effectively locked in if they’re not corrected first.
The guy who did my tint also does ceramic and he showed me some cars in the shop. The owners thought their paint was perfect but under good lighting you can see small swirl marks that marred the paint during improper care. The cost of ceramic coating your car will greatly depend on how much work they have to put in to correcting all the defects.
Also, there are many myths about ceramic, mostly pushed by the manufacturers and pro installers. Here’s a decent article about the advantages and disadvantages:
The Truth About Ceramic Coatings: What You Need to Know
One thing not mentioned in that article is even if an installer offers a warranty for their coating you need to carefully study it. Most ceramic warranties will be voided if you don’t follow very specific care procedures. For example, they won’t honor the warranty if you use an automatic car wash or if they think you used improper materials to wash the car.
Also, the claims that ceramic will stop chipping and dinging from rocks and what not is overblown. The surface will be scratch *resistant*, not scratch *proof*. The only way to completely protect your paint from that stuff is something like a vinyl coating which can run $4000-5000.
My estimates were that it was gonna cost upwards of about $1000 to ceramic cost my Model 3. After researching, I figured it wasn’t really worth it. My $0.02.