I've got a black leather Uk and several leather Rkilts plus a couple of normal woollen ones. I would opt for the leather each time as it looks better when creased...the woollen tend to just look slovenly...that fresh out of bed and not washed looked about them(when they are creased that is before someone miscontrues my meaning)
The leather ones get the attention of other people if that be your thang plus you get remembered.