For the Vajrayana , Enlightenment is Rainbow Body.
It is impossible to count exactly how many students in Tibet
received empowerment from Padmakara in person, but the most
renowned are the original 25 disciples, the intermediate 25
disciples and the later 17 and 21 disciples. There were 80 of his
students who attained rainbow body at Yerpa and also the 108
meditators at Chuwori, the 30 tantrikas at Yangdzong, the 55
realized ones at Sheldrag. Of female disciples there were the 25
dakini students and seven yoginis. Many of these close had
bloodlines that have continued until the present day.
At present he dwells on the vidyadhara level of spontaneous
presence in the form of the regent of Vajradhara, unshakable for as
long as samsara remains. Full of compassion he sends out emanations
to benefit beings. Even after the teachings of the Vinaya have
perished he will appear among the tantric practitioners. There will
be many destined disciples who attain rainbow body. In the future,
when Buddha Maitreya
appears in this world, Padmakara will emanate as Drowa Kundul and spread
the teachings of Secret Mantra to all worthy people."
http://en.wikipedia.org/wiki/Padmasambhava
The similarity of Mahayana and Vajrayana is the prediction of
Maitreya Buddha coming.