The first was easy: you can't have one law about limitations of the size of a sign for commercial advertising and another for religious messages. That's discriminatory against religions and the ruling was 9-0.
The second was more nebulous: can Texas refuse to make a vanity plate with the Confederate flag. The issue is private free speech vs. government's right to control its own rights to free speech. The court ruled that license plates issued by a state is government speech, and therefore have the right to control what speech it makes. It's the same principle of not allowing profanity, anti gay or pro Nazi vanity plates according to 5 of the justices. I'm surprised the other 4 disagreed; to me it was very simple but I knew it would be close. The issue of the governments right to free speech vs. private rights is not always clear.

