Both Talmudhim indicate that one is to wear T'philllin during Hol HaMo'edh.
The Rif, Rambam, Rosh and Tur all agree that the misswah applies even during Succoth and Pesah. The Shulhan Arukh says otherwise, contrary to his own rule of thumb. He was influenced by the Zohar. A classic and telling example of the influence of Qabbala on Halakhic practice.