As Vic83 says, the EXR-40 is in the same line of EM-55or and is focused on middle east/arabic market, while the GW-7 is focused on far east market.
EXR-40 was born in europe under supervision of greek, egyptian, turkish and other music consultants of mediterranean area; GW-7 was born in China and was originally intented only for far east market, then has been extend also worldwide.