Arch packages are more current than Debian Stable, being more comparable to the Debian Testing and Unstable branches, and has no fixed release schedule. … Arch keeps patching to a minimum, thus avoiding problems that upstream are unable to review, whereas Debian patches its packages more liberally for a wider audience.

Is Arch Linux better?

Arch is a well-done distro which caters more to a knowledgeable crowd that likes to customize their Linux. It’s not the best option for a newcomer, although there are re-spins of Arch such as Manjaro and Antergos which make things easier.

Is Arch Linux really faster?

tl;dr: Because its the software stack that matters, and both distros compile their software more-or-less the same, Arch and Ubuntu performed the same in CPU and graphics intensive tests. (Arch technically did better by a hair, but not outside the scope of random fluctuations.)