>>22188469asphyxiation = blocked airflow to the lungs (suffocation)
strangulation = blocked blood flow to the brain
in martial arts, there are "air chokes" which employ asphyxiation and "blood chokes" which employ strangluation.
asphyxiation can take minutes to knock someone out, whereas strangulation can kill someone in less than 30 seconds.
if you're strong & untrained, you might accidentally kill someone by strangulation without even meaning to.