Like many other manufacturers (and not just of sports goods), Yonex markets different lower-rung models in different territories. This is usually to prevent territorial dealer rights from being breached. In other words, it is a self-protection mechanism.
For example, to prevent dealers in Asia from selling to customers in North America, Yonex offers the Voltric Omega in Asia. Should you buy one and then claim a warranty in Canada, it wouldn't be accepted. In similar fashion, Asia doesn't have the Voltric Pegasus (which very much resembles the Voltric 7).
By no means am I saying the Voltric Pegasus is either a genuine or a fake Yonex product.
In the absence of a Yonex weblink, the true test of worth is the reputation of the dealer.