Relapse is more lyrically advanced. So far advanced that Kanye is still studying the quantum physics of the album. Recovery is a more pun-intended come-back album. The two really can't be compared, but you can easily say which one you prefer more. Relapse, IN MY OPINION YOU CRAZY-ASS STANS, is a far better album in terms of what I like about eminem. Some people enjoy the accents and crazy side of him, others enjoy his heart touching lyrics (which i honestly think is gay, but whatever floats your boat.)
@Whitefox, I love your appreciation. Made me one happy album.