Chipworks: Both Samsung and TSMC are making the A9 chip for Apple

Chipworks digs up more information on Apple’s new A8 chip

A16 chip design means it's really an A15 , argues Macworld

A17 Bionic Prototype’s Performance Numbers Leak Out, With Apple’s First 3nm Chip Seemingly 43 Percent Faster Than A16 Bionic In Multi-Core Test

Apple A15 bionic vs Apple A14 bionic: chipset comparison - Tech Arena24

A17 Pro vs A16 Bionic: this is how Apple’s best chip stacks up against its own competition - Softonic