$C{H_3} - C{H_2} - \mathop C\limits^ \oplus H - C{H_3} > C{H_2} = CH - C{H_2} - \mathop C\limits^ \oplus {H_2}$
${\rm{5 }}\alpha {\rm{ - H \,stabilises}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{2 }}\alpha {\rm{ - H\, and\, - I \,of}}$
${\rm{by: hyper\, conjugation}}\,\,\,\,\,\,\,\,\,{\rm{double\, bond \,so\, less\, stable}}$