I, too, would prefer 'simile'. 'Analogy' carries with it the notion of comparisons on a more extensive level. The comparison here seems based on the single characteristic of durability.
The comparison of two things, which are alike in several respects, for the purpose of explaining or clarifying some unfamiliar or difficult idea or object by showing how the idea or object is similar to some familiar one. While simile and analogy often overlap, the simile is generally a more artistic likening, done briefly for effect and emphasis, while analogy