Presence, in my opinion, is more of a progressive rock album. Its not progressive in any means, but compared to most other LedZep albums, the songs in general are more prog. Compare that to ITTOD, which sounds nothing like the Zeppelin we had heard before. ITTOD sounded different for a LedZep album, with almost every song containing keyboard or piano. And it also has a few songs that have zero reminiscence of their other works (Hot Dog and South Bound Saurez). ITTOD is also full of fun, playful songs that are fast and upbeat compared to darker, moodier songs on Presence. Take Achilles Last Stand and South Bound Saurez. SBS is fast, has a short solo, and has a piano moving at 100 mph. Achilles last stand has heavy drums, a darker solo, and it starts slow.