The second mod is another mod that replaces all the vanilla clothing textures with higher resolution textures.
2X Clothing Re-Mix – Kobayashi’s Mix, a Skyrim mod that improves the look of all default NPC clothing It is for this reason that you should use this as a base mod to ensure that all clothes in Skyrim are improved and also look consistently good. The detailing is excellent and the clothing textures are much more defined. The colours are more vibrant while remaining close to the default ones.
You can see from the screenshots above, the mod improves the textures without changing the overall look of the clothes.