It might work, the connector looks very much the same. But the Vega dock has no LAN output and I don't know if this will work on the Vega. The tablets might have a different thickness as well, so the Vega might not fit, even if the connector is the same.
Maybe better to look for a dock for Viewsonic Viewpad 10s. This is available in Europe as well and is definitly the same HW and very similar case to the Vega.