At first glance from afar, your long irons may resemble a Srixon ZXi utility iron. But on closer inspection, you’ll find they are distinctly different in many ways.
They’re roughly the same length, but the head on your utility iron will be significantly larger and more rounded towards the base. Closer to what you’d expect from a fairway wood, but not to that extent.
Because of this, you can expect a vastly different swing shape and effect when you catch the ball. If anything, you’ll find a Srixon ZXi utility much easier to hit than your long irons.