Linguine is a type of pasta like spaghetti, but linguine is a long flat noodle and a wider noodle compared to spaghetti. Spaghetti is a long, thin roundish-shaped noodle like a string. Linguine is thicker and wider in shape with a flat cut to it, but not by much. Linguine is similar to Fettucine noodles as well, but linguine is not as wide. So, linguine and Fettucine are both flat and wide, but Fettucine is an even wider version of linguine.