as Apple transitioned from PowerPC to x86 (see MacBook Pro). Note that Core Duo and Core 2 Duo chips are not the same (see Intel Core). The Core Solo CPU was a single-core version of the Core Duo.

On performance, the new MacBook Air moves up to Apple’s speedy M1 chip, while HP’s Spectre x360 14 adds 11th-gen Intel Core processors ... The Spectre x360 14 is also a 2-in-1 convertible ...