Specialized vs. S-Works

Equipment
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I have a 2016 tarmac expert with ultegra 6800 and the FSA K Lights cranks-I upgraded everything to Dura Ace9100 after two years and it’s a completely different bike also changing to fsa carbon handlebars and enve carbon stem-The changing components significantly change the weight-I have an S works seat post. When considering changing the stem I was told that the only difference between S. works and Non S. works stems are the titanium bolts and the logo-so S. works will shave some grams but the S is really just a $ without the line