Not as far as I know. They're just cosmetic (non-functional). You can usually tell if they were there before, as there's usually rough solder on the surfaces were they were mounted.
I have a Red Tip that has both end caps missing as well. It looks a little weird, but it shaves fine. It cost me a lot less, too. I keep hoping to come across a pair of spare endcaps to put on it and touch up its looks. The razor is in great condition otherwise.