Malt refers to malted grains which make up the majority of the grain bill for most beers. Grain can refer to either malted or unmalted grains, so you need to understand the context. Unmalted grains are often used in small quantities to add body, flavor, or other characteristics a beer, but do not add any significant amount of fermentables. Most of the unmalted grains used in brewing are flaked. The product you linked appears to be malted barley.