Enumerable Skip

I have two codes as follow,

Code 1

           int[] grades = { 1, 2, 3, 4, 5 };

            var q = from c in grades.Skip(1)
                    select c;

            foreach (int number in q)
                Console.WriteLine("{0}", number);

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Code 2

            int[] grades = { 1, 2, 3, 4, 5 };

            var q = from c in grades
                    where c > 1
                    select c;

            foreach (int number in q)
                Console.WriteLine("{0}", number);

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They provide the same result.
If the list contains billion values and filter condition is different, base on the performance which one is better?