There are more than just seal and flame point... point is a pattern in cats where their body is one colour and all the points (like feet tail, nose, ears) are a different color, usually I think darker than the rest ...I'm not an expert but that's the basics...

I have 2 colour point british shorthair- Kfitzi is a blue point, and Milki is a Lilac Tabby point.

How do you know the difference? well sometimes it's easy to know but sometimes you have to know a lot about breeding and colours to know exactly...

Here is Kfitzi with his blue points


and Milki with his Tabby lilac points ( much lighter color with a tabby pattern)