diff --git a/include/xo/unit/quantity_ops.hpp b/include/xo/unit/quantity_ops.hpp
index 63be47c0..5b4513bb 100644
--- a/include/xo/unit/quantity_ops.hpp
+++ b/include/xo/unit/quantity_ops.hpp
@@ -47,6 +47,17 @@ namespace xo {
         {
             return (Quantity::compare(x, y) == 0);
         }
+
+        /** note: won't have constexpr result until c++26 (when ::sqrt(), ::pow() are constexpr)
+         **/
+        template <typename Quantity, typename Quantity2>
+        requires quantity2_concept<Quantity> && quantity2_concept<Quantity2>
+        constexpr auto
+        operator<=> (const Quantity & x, const Quantity2 & y)
+        {
+            return Quantity::compare(x, y);
+        }
+
     } /*namespace qty*/
 
 } /*namespace xo*/
diff --git a/include/xo/unit/xquantity.hpp b/include/xo/unit/xquantity.hpp
index 3d2606be..83f64d49 100644
--- a/include/xo/unit/xquantity.hpp
+++ b/include/xo/unit/xquantity.hpp
@@ -331,16 +331,6 @@ namespace xo {
             return Quantity(x, nu::dimensionless) - y;
         }
 
-        /** note: won't have constexpr result until c++26 (when ::sqrt(), ::pow() are constexpr)
-         **/
-        template <typename Quantity, typename Quantity2>
-        requires quantity2_concept<Quantity> && quantity2_concept<Quantity2>
-        constexpr auto
-        operator== (const Quantity & x, const Quantity2 & y)
-        {
-            return (Quantity::compare(x, y) == 0);
-        }
-
         /** note: won't have constexpr result until c++26 (when ::sqrt(), ::pow() are constexpr)
          **/
         template <typename Quantity>
@@ -361,16 +351,6 @@ namespace xo {
             return (Quantity(x, nu::dimensionless) == y);
         }
 
-        /** note: won't have constexpr result until c++26 (when ::sqrt(), ::pow() are constexpr)
-         **/
-        template <typename Quantity, typename Quantity2>
-        requires quantity2_concept<Quantity> && quantity2_concept<Quantity2>
-        constexpr auto
-        operator<=> (const Quantity & x, const Quantity2 & y)
-        {
-            return Quantity::compare(x, y);
-        }
-
         /** note: won't have constexpr result until c++26 (when ::sqrt(), ::pow() are constexpr)
          **/
         template <typename Quantity, double>