What is tree is better and faster for exp a willow or yew?

Cutting willow trees in Free to play is better experience because they chop incredibly fast and there are less bots at willow trees because they are less profitable. I recommend you cut willows until level 85 woodcutting then move onto yew trees. If you are a member than cut maple trees around Seers' Village, they chop a bit slower than willow trees but there are much less bots and there are quite a heap of them to the north-west.