Depends where you are
Out in the sticks, DAB reception often a total joke - typically dire sound, when its not cut out totally.
FM is often poor in places, but it degrades nicely and is always listenable (degraded DAB is often just total ear pain)
I'm sure OFCOM claim areas I travel frequently are covered by DAB .. but its teh same as various telcos claim there is mobile coverage there - the DAB equivalent of edge! and not fit for purpose.