WZ-10
AW A129
The most noticeable difference is the sloped body of the WZ-10. It appears that the WZ-10 was designed with stealth elements to reduce its radar signature. In contrast, the AW A129 has a traditional flat fuselage.
There are many other differences that are obvious, such as the placement of the frontal landing gear (e.g. the struts are placed under the pilot's cockpit for the WZ-10 and the navigator's for the AW A129). The air intake for the WZ-10's jet engine is not obvious, another likely stealth feature. On the AW A129, the gaping hole for the air intake can be clearly seen.
On the whole, how similar is the external appearance of the WZ-10 and AW A129? You decide.