Both albums are great. This is not really an easy choice for me. CTA's debut album was not their best, but possibly their second best album and I think From Genesis to Revelation is a vastly underrated album, one of the best concept albums of 69, and is one of the Genesis albums I enjoy listening to the most. Of course both groups changed dramatically from their earliest incarnations, and Genesis's change may have been a bit more dramatic. I will say that if Genesis had maintained the Moody Blues like style that they were embarking on in 69 and never became known as a progressive icon, we would be looking back at From Genesis to Revelation as a classic, not as group "stumbling for an indentity". That being said, I still have to give a slight edge to CTA's debut album which has a soulfulness that transports me back to the 60's every time I listen to it.