Both are permissible. If you prolong the 11 Rakah to include a long time, this is best.

During the last ten nights of Ramadan, can we still perform the usual 8 rakaahs of taraweeh + 3 rakaahs of witr or do we have to step it up and pray more in order to get the reward of praying the whole night in laylatul Qadr?

Taraweeh, Tahajjud and Qiyam-ul-Layl |