And poetry is so much more than the rhymes: it could be that this person didn't really know English poetry as well as Russian poetry, or that he was more easily impressed by exotism. I read French natively and have been living in English for 10 years and can now read Snow Crash-like stuff, and English always amazes me more than French, just because it can be so much richer than I'll ever produce myself, stuck to my French roots.
So if I read at random this in English: https://www.poetryfoundation.org/poems/43844/she-walks-in-be... and this in French: https://fr.wikisource.org/wiki/Les_Contemplations/R%C3%A9pon... , I can feel a mysterious beauty in English maybe I can't feel in a French poem, while the French one explodes in meaning, makes me think more than contemplate.
Rhymes are like a little funny exercise in poetry to add some music, but really far from the goal, or so I hope. I feel it's one of the many inputs: you have the rhymes, the rhythmic internal divisions of the stanza, the symmetry between them across the text, and you can add lots of little funny meta-meaning by reversing meaning in two halves of two successive stanzas, stuff like that. A poem is just a text that does more than transfer information at the first level, but does it on many more. English, Russian or French, they can all do it.