Each type of grill can bring out some awesome qualities in your steak. Wood smoke contains compounds like guaiacol and syringol, which can give an earthy, smoky flavor as they seep into your meat. Charcoal has similar compounds, like lignin and cellulose, that can also add some definition to a steak. Additionally, charcoal grills can reach higher temperatures, making them great for searing. While gas-powered grills don't release compounds that flavor your meat, many prefer them for their ability to maintain lower temperatures, sealing in juices.