No. Goat cheese is creamy, tangy, really smooth, and comes from a goat. It can completely mix into any sauce and not leave any texture behind—it's absolutely creamy. Feta cheese, on the other hand, depending on which type you buy, can be hard, very salty, crumbly, and does not do well as a creamy additive, but more so as a filling. Also, feta cheese can come from a cow or a sheep. My favorite feta cheese is Bulgarian cheese. I like to drain the brine that the olives come in. Rinse well. Dry them pretty good with a cheesecloth or paper towel. This will ensure no water goes into our marinated. If water mixes with the oil, there will be a greater chance for spoilage sooner than we would like.