Is there a reason to choose it?
A different case size is a reason. So is a high-contrast numeral dial for someone who wants more explicit hour markings. A dark face with a rust seconds detail offers a different balance from a plain light dial without asking the buyer to accept a story about status.
The short range makes these distinctions easier to see. Arc 36 and Arc 40 do not need identical descriptions with a number swapped: one presents a compact light-dial case, the other a larger graphite-dial case. The difference should be evident before you reach a form.
Our material language follows the same rule. Brushed steel describes a visible finish. It is not shorthand for a metal grade or an unsupported durability claim.