While both of them sharing the almost similar 2.4L engine, Euro have double intake in the engine while the normal Accord only have single intake. Euro requires premium unleaded fuel to run the engine efficiently. All Euros built in Japan, normal Accord and even the V6 model were built in Thailand. The interior design is similar but the fit and finish quality in Euro is higher, I feel the interior material is also quite different between the two. Euro is even a better drive if you've tested the 6 speed manual version.