Wilko potatoes possible experiment.

I have been trying to pick what spuds to grow this year. I only grow earlies as we think they taste much better fresh than shop bought and it frees up space in my small veg plot sooner. I usually grow Charlotte but am considering trying other varieties again (lady crystl especially, but I never get organised enough to get any). 
This year I've been reading around and seen a few articles saying you should always buy seed potatoes from a "reputable supplier" and avoid the discount shops as they have inferior seed spuds. 
This got me thinking, I may buy some seed potatoes from a well known specialist supplier and same variety from wilkos and treat them the same. 

Has anyone done this before or had any experience with cheap spuds?