User blog comment:OtterJiang/Spanish VOCALOID/@comment-53539-20150110094247/@comment-4042934-20150110173425

Correct me if I'm wrong, but at the time Sonika was released not only english vocaloids got down with the "low quality" stamp just because they were english, but she also had to be accompanied with the CGI boxart, which (no offence) looked very lazily made and amateur compared to the others. No matter what way Zero-G would try to promote her, she wouldn't get any spectacular attention.

SeeU got praise for her "English" capabilities due to her marketing before her release. Add in the fact that she comes from an asian country and has an attractive design (As these are among the stuff people of the overseas fandom notice first, dare I say they only look at the designs and make assumptions).

In the case of Maika, Voctrolabs did say that native speakers may not be satisfied with the results of the extra phoenemes. It is people who gave them so much credit because of her design.