Compare feel, appearance and the care requirements of the exact fabric.
Begin with how the room is used: everyday family seating, occasional guests or a quieter space.
Compare what matters to you
Look at texture, visible weave, colour in different light and the care instructions for the specific fabric. Samples are helpful for comparison, but ask about any performance claim you need explained. Avoid assuming that a description such as easy-clean means stain-proof. Keep the fabric name and colour reference so your final choice is unambiguous.