Dye is a totally different animal than Brothers. He's a MLB but not a fit for nickle CB or S.
Brothers is more like EJ Henderson, a 2-down downhill thumper. Dye is more of a 3-down ILB like Kendricks who is better in coverage but going to need to add strength.
Watched every game of his career at Oregon, he's a great kid with great instincts. Also, he could easily play ILB next to Kendricks in a 3-4 ... don't forget we have Dom Capers, and all 3 of these picks in Round 4 would be scheme fits for a 3-4.