Usually normal white wun turn yellow that easily. Even after 10 yrs still look white.
Pearl white yes. Nornally people said pearl white will turn yellow faster than normal white.

Lol. But pearl white will turn yellow easily especially if u not maintain it well, such as rarely wash ur car. Normal white so far i see not turning yellow that easily. I saw example 1 of my colleague 1999 iswara sedan white, til now still original color he nvr change color. Still white, just that it turn faded white, no yellowish.
Pearl white easily turn yellow myb becos of the extra shine special coat on the white not tahan lama. Just myb lol.
Pearl white more high maintenance, not just need wash, but need to wax too.