Isn't the WellPro also a DSG? Potentially, it may fail sooner than a regular airsoft AEG might.
I think there were people on here who grabbed the WellPro MCX DSG and had the ETU fail on that too but I think it was one, or maybe two, people. On the complete opposite end, i've seen people on the internet say that theirs has just kept trucking on.
It's probably just the luck of the draw.