Samsung certainly won't take a principled stand on this and stop allowing app tracking. And in a competitive market, deciding to not sell cell phones in China means less development capital for designing the next generation of hardware. They'll start circling the drain and wind up like Motorola or HTC.
I'm not saying that they shouldn't be consistent - just that choosing to not sell in China will mean losing everything outside of China eventually.
That seems to be the case with many businesses. Nobody wants to lose that entire market just to stand on principle.
The only other "big stance on privacy" that Apple has is that, unlike their main competitor Google, they are not an advertisement business. So they have no real financial motivation to add tracking to their devices and software vs a Google were advertisement and user tracking are pretty big pillars of their financial income.
Infrastructure like that is trivial to hijack for surveillance once in place, which privacy wise makes Google devices and software by default the worse choice unless using specifically cleaned and hardened custom roms.
So while these two issues are related, legal intercept and privacy, they are not as easily conflated as you make it sound when you claim Apple is having "double standards" when they really are not "double standards" but simply abiding by local laws and regulations.