Yep. The potato makes a big difference also. I'm not always into organic, but the organic potatoes do have a different texture. You can really tell.
I Used to do quite a bit of Veg Container Gardening.....
THere's a world of difference in taste & texture between Heirlooms & Hybrids.... Best example of this is Tomatoes... THe ones you see in the Supermarket are all uniformed, same size, color weight etc.... And they are bred to have very thick skins and little juice to avoid bruising so you can pile them up, and a super long shelf life... They also taste like Cardboard because they are picked Green and Ripen in the Box during shipping... The Heirlooms are so much better...
I know exactly what you're saying about the Potatoes.... I grew several Varieties of Sweet Potatoes organically from Slips I took off Potatoes I got at a local Green Market... Just incredible how good they were..