The enchantment on my steel armor compared to my daedric armor is about 17,5% more powerful? Is there a penalty on the daedric armor? I can see the improvement on 2-3 armor pieces. I've 100 entchantment skill and the entchanment is carry weight and fortify one-handed. I enchanted them with a long period of time in between so maybe I just confuse some values.
EDiT: I think this a glitch!!!! I've verified it. When I select an item and then the enchantement the system proposed a 17,5% higher enchantment percentage. Then when I must choose a gem to fuel the weapon I select my black star filled with a grand soul worth 1000g. Until now everthing is fine. But when I select for example a Grand Soul Gem filled with a grand soul worth only 500g then I get my expected lower entchantment percentage. When I change back to the black star it doesn't show me the higher entchantment percentage it shows me before the glitch? I can select the glitch again and select a grand soul or any other gem and back but the enchantment percentage remains about 17,5% under the first value? Hence when I craft the item I get only the maximum fuel of a grand soul gem filled with a grand soul even when my current selection is higher? What do you think? Do you can fix it? I've version 1.3.10 of the game.