Are you asking about quality between airsoft and real steel, or quality between airsoft grips? Whichever way you go, they will both be sufficient. I have a King Arms vertical grip which is a knock off of the real steel Tango Down grip. And I have no problems with it at all. I even had it on my real steel AR15 for a while until my surefire M900 came in. If its an actual airsoft product, not soft air, it will be more than sufficient.
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