They are a set - panels match. The 1978 Wards catalog shows this exact pair which would make it post-WCI takeover of the Westinghouse appliance division. You likely wouldn't be able to tell much difference opening the lid though, they looked just like the earlier Westy machines. IIRC, the dryers even had the Cross-Vane tumbling drum design. I remember comparing the tumbling with a neighbor's Westy dryer and our GE and could find no difference in movement while the machine was running.
I don't have enough Wards catalogs to know for sure, but it was around this time (late 70's) that Wards began sourcing some of their appliances from WCI, most notably their dishwasher line was completely WCI after the Frigidaire division was sold to WCI in '79.