The first is English speaking skills. There’s a reason that there are so many call centres based in the Philippines. Their English is pretty much 10/10. (As I type this I am hoping I don’t have any grammatical errors in this article, otherwise you’ll all make fun of my English skills). You might not appreciate the difference of great English skills vs not bad if you are looking for a vacation trip, but long term being able to communicate to your banker, supermarket clerk or tattoo artist makes a vital life difference. Being able to read all the English signs in the Philippines vs 50/50 Thai/English is also going to quickly remind you of how important English is.
Another reason is the length of stay allowed. The Philippines allows you to stay for 36 months on a tourist visa (via extensions). Thailand has a much shorter 1 year stay. I know people reading might say immediately, “That’s not true, you can hop in and out of Thailand, just keep renewing.” That’s true, but it is a representation of how the 2 governments treat expats. The Philippines actively encourages foreign nationals to stay, while Thailand seems much more grudging. If you look at the differences in long term retirement plans you’ll see what I’m talking about as well. Neither countries want illegal visitors but Thailand doesn’t really seem like it wants legal ones either.
The third reason is freedom and government. I love Thailand but, they have some odd odd laws. They have these strange no selling liquor between 2-5pm laws, and no internet porn laws. They have blowjob bars, illegal beer vendors that sell booze all day and happy ending massage places, but you can’t watch pornhub and violent movies are censored and edited in theatres. I know this might not seem super important, but think of this. If they are so restrictive on small things, things like other civil liberties can be quickly affected.