tolpanra lujvo

x1 contrasts-with/is-distinguished-from/is-set-apart-from x2 in property/aspect x3

Things are parallel, analogous or equivalent in some property when they share that property, not when they differ in it, so the te panra has to be the property which they share and makes them parallel. When the focus is on a property that they don't share, the things are said to contrast in that property, they are not parallel in it. See also panra.