Indonesia is no 10 on this chart...ahead of malysia.indonesia is a fairly poor country and malysia is fairly rich....
Which is exactly why Indonesia would be higher with PPP instead of nominal. PPP tends to favor poorer countries because living expenses is lower, hence more purchasing power for the same nominal value.
You are the first Chinese to refer to PPP. Most Chinese ignore PPP.
The PPP vs GDP validity is a bit more complicated than most people go with. This is because when we discuss GDP, we are typically measuring how well the country is doing and in general, with more GDP, the country did better (this, of course, is a gross simplification, but you get the idea) As a result, if we are talking about products that is mostly domestically produced, PPP is actually a better measurement than nominal. On the other hand, if certain products are heavily reliant on import, then nominal tends to be better. (This would involving other complicated factors in the consideration too.)
Take India for example, India is a large producer of rice and it is one of India's main export. As a result, when measuring rice production for India, PPP is more appropriate than nominal. In comparison, India is a larger importer of electronics. Hence for electronics, nominal is a better measurement.
India
Of course, purchasing power itself is kinda iffy to measure considering larger countries naturally has uneven distribution of purchasing power across its territory.
This gets increasingly skewed for low volume/high value sectors. For example, military hardware purchase heavily favors the seller to the point that if the country does not product certain piece of critical military hardware, it will routinely pay several times of the production cost for it.