The binding legal principles are: (1) For special leave to appeal to be granted under s 16(1)(d) of the Superior Courts Act, something more than reasonable prospects of success is required - special circumstances must be demonstrated, which may include that the appeal raises a substantial point of law, or the prospects of success are so strong that refusal would result in manifest denial of justice, or the matter is of great importance; the mere existence of a dissenting judgment does not constitute special circumstances. (2) In comparing trade marks for likelihood of deception or confusion, the court must identify dominant features - where marks share a dominant distinctive feature (particularly an invented word with no meaning in English), there is a greater likelihood of deception or confusion. (3) Matter that is not intrinsic to the mark and has no trade mark significance (such as descriptive words indicating flavour variants) must be excluded from comparison. (4) There is interdependence between similarity of marks and similarity of goods - the greater the similarity between marks, the lesser the degree of similarity required between goods. (5) Marks are deceptively or confusingly similar if they are phonetically, visually, or conceptually similar on even one level of comparison. (6) Goods are similar if they are used for the same purposes, by the same consumers, sold through the same trade channels, placed together in retail environments, and compete with each other - all snack foods fall within this category regardless of whether they are plant-based or meat-based. (7) Under s 10(17), only a likelihood of unfair advantage or detriment needs to be shown, not concrete evidence - a well-founded basis supported by facts suffices.