Welsh anthracite versus Alberta coal

Who has better coal, Wales or Alberta, with Appalachia added to the comparison?

Wales if Alberta lacks comparable anthracite, but Alberta's coal quality is unknown here; Appalachian bituminous coal is dismissed as an equivalent.

The preference for Welsh coal depends on whether Alberta can supply comparable anthracite. Alberta's coal quality is expressly left unknown. Appalachian coal is characterised as bituminous and dismissed as an equivalent to anthracite in this comparison. The resulting preference is conditional and does not establish a confident ranking of the two regions.