Coleus and perilla can share visual features, including opposite leaves and colourful foliage. Those similarities are not enough to decide what a plant is or how it may be used.
Keep a reliable botanical identification and traceable source. A colour match to an internet photograph should not be used as a reason to taste an unknown leaf.
Photograph more than the colour
Record the leaf shape and surface, the arrangement on the stem and the plant's overall habit. Flowers, when present, can add useful evidence. Young plants and named varieties can differ from the familiar examples used in general comparisons.
For an ornamental planting, choose the plant for its identified growing requirements and expected size. For any intended food use, obtain the appropriate verified plant from a source supplying it for that purpose.
If the nursery label is missing or contradictory, ask the supplier before putting the plant into a mixed collection. Preserve the answer and the label. Identification is a separate job from admiring the foliage, and the first should be settled before making assumptions about the second.
NC Extension describes opposite leaves in both Coleus scutellarioides and Perilla frutescens. That shared feature cannot identify an unknown plant as culinary perilla. Keep ornamental comparisons separate from decisions about eating a plant.
Related reading: Coleus vs Perilla: Leaves, Flowers and Growing Habit.