"Often the perception is way out of whack with what the reality is, both of current trade and what would actually happen under a liberalisation scenario," he said.
Harvey drew on the EU's impact assessment of free trade agreements with both New Zealand and Australia to support his point.
The modelling indicated a deal would increase EU exports of meat such as pork, dairy, and other food and beverages, while New Zealand exports of dairy, beef and horticulture would rise.
European beef production would face the biggest decline, while New Zealand beef and horticulture output, and dairy to a smaller extent, would increase.
Berz said the EU was aware New Zealand's primary export products were agricultural and that greater market access will be a key sticking point. However, agriculture always comes up as an issue in all the bloc's negotiations, he said.
Harvey said geographical indications - which restricts the use of regional names in the sale of products - are a particular area that will need to be worked through.
Both parties have been tasked by politicians to pursue an ambitious agenda on sustainable development goals to encourage better outcomes for areas including the environment, labour rights, and corporate social responsibility.
The EU is in the process of commissioning a trade and sustainability impact assessment, which will analyse the agreement's potential impacts on issues such as human rights, gender, and the environment.
The negotiations are taking place against the backdrop of growing trade protectionism, something Finance Minister Grant Robertson noted yesterday as a key risk to the domestic economy.
Meantime, International Monetary Fund managing director Christine Lagarde today opened the annual IMF-World Bank meetings in Bali, Indonesia with a speech entitled 'How global trade can promote growth for all'.
She said the three priorities in building a trade system that works for everyone involves cooling current disputes, modernising the current system, and introducing domestic policies to ensure trade benefits more people.