Of course it makes a difference. Durability Up makes them last longer before breaking. Long Throw makes the distance you can throw the weapon longer, which is especially true for spears. Critical Hit makes the final hit in a combo attack a critical hit. The difference in color denotes how much of these boosts the weapon has. For example, a Blue durability mark is weaker than a Gold durability mark. They're... pretty self-explanatory.
Thanks for the answer it's true but it was not exactly what I was asking.
I was not asking about what the affixes are. I know they are good and have a use. I was asking if, for example, Durability Up (white colour text) is different to Durability Up (green colour text). I am purely focusing on the text colour only here. I am asking about the white vs green texy colour only.
@the8thark Along with what Az said, the icon color also indicates which bonuses will be removed after you put them on display in your house. White icon bonuses will be preserved, while yellow icons will not. Weapons with higher attack bonuses are yellow and will not be kept if you put them in your house. As I have made this mistake, dont put five-shot burst bows in your house. The green text I believe applies to whatever you have equipped. It's the same with armor bonuses.
I've explained the slught confusion between what Az said (all factual though) and what I asked.
But
@Satan what's this in your house thing? If you have an item on your wall in your house, you get that displayed item's bonus as you run around in the game? Or does placing an item on your wall strip it of it's affix? If someone could further explain this, I'd be happy as it's not clear in game how this works.
I do know the little arrow just shows the attack bonus or armour bonus relative to what weapon you are currently holding. As in if you are holding a 50 attack weapon, a 60 weapon on the ground would have an arrow up and a 40 would have an arrow down. Because 60 > 50 > 40.
What I am talking about is not the icons next to the affix word. I am talking about the item affix word itself. Some are written with green text, other with white text. I don't think I've seen any yellow text item affixes yet. Not sure if that's to do with the item I have equipped or even why it's not all the same colour text.