If you want folded, consider using a Z-rest.
Other than that, I think it depends on the pack design and how you load your gear. The rolled/burrito method is better for packs with lighter fabric and fewer compression features, helping to fill the whole pack bag and protect it from internal sharp points. The rolled method is also good for packing without stuff sacks, with a trash compactor bag in the center and your insulation and dry clothing stuffed in that.
If you have a pack with multiple compression straps and less fabric stretch and you like separate stuff sacks, then the folded method reduces the lumps and bumps against your back.
With either method, you are trying to make a stable column to get the weight transferred to the hip belt. If the pack sags and pulls away from your back, it is less stable and you end up with more weight and stress on your shoulders. It takes some fiddling and practice-- good winter project!