Both of them have the same reviews according to Capterra however Zoho Survey is cheaper by 5$ per month. Moreover, Zoho Survey is included in the Zoho One subscription based on which you have access to more than 40 applications- including Zoho Survey- with only 30$ per employee. As such, the price of Zoho Survey could be dropped to minimum if you wish one or more Zoho One applications such as Zoho CRM, Desk, Social, PageSense, Sales IQ and so many more.