As many others as well, I also can confirm that C13 maxes out earlier and drops out more often than C12, talked to a developer short time ago and they are aware and trying to get it fixed. There are huge threads about it as well.
@st10ss No need to be so unhelpful. There are quite some threads open about it:
Cubase 13: random CPU spikes still here, is maddening - Cubase - Steinberg Forums
NO rant , just facts Cubase 13 Audio engine Spikes compared to Cubase 12 - Cubase - Steinberg Forums
Cubase 13 ram/cpu issue - Cubase - Steinberg Forums