Exactly! There are subtle differences in dialog and scenes depending on which traits we concentrate, not only with Seymour. But a Lena able to have an intelligent discussion and looking good with graceful clothing sryle, is surely a winner with Seymour. He also opens up about himself a lot more on such paths.Arthur pointed out that Seymour has changed girls throughout his career. Who knows, Lena, with beauty and brains, is the combination that Seymour was looking for throughout his life and might change his perception
While it certainly is possible that Seymour ends things with Lena one day, esp. if they have very different traits/outlooks, I doubt it to happen if both share many similar traits/outlooks.