The major difference is that Spear doesn't have his Sharingan yet! So pretty much any icon that he has his Sharingan in is otherwise inaccurate. His hair is only loose when it needs to dry. Other than that he looks just like in his icons. ...Actually, he looks just like in most of his icons from flashbacks to when he was 10-13.
Clothing-wise he wears the full Lynx uniform pretty much all the time, though he'll take off the jacket or roll up the sleeves as various chores require it, and keeps a damaged set for Games. The sash outside his jacket probably now has two knives attached to it, one per side.