Brazil Copags, Trefl, Platinums/Guild* are soft. (*if flat!)
KEM are very soft.
Fournier, Dal Negro, Copag BEL, Broken Arrow are a bit stiffer.
Fournier EPT are 2818 with bright red - nice cards.
Platinums fade fairly quick, but they are the most comfy cards in the <10 bucks range.
Dal Negro is very close to Fournier, just half the price.
This is my impression, may vary to others.