That's crazy!!!(in a good way). It's way to impossible to decide, both groups are amazing and have so many hits that I listen to regularly STILL. But if I were forced to pick, overall I'd have to go with EW&F, but again I appreciate both groups to much to pick without a lot of reluctance and hesitation. "Summer Breeze", "Footsteps in the Dark" and "Who's that Lady?" are a few of my Isley Brothers favs and with EW&F, I absolutely love "Love's Holiday", "September", "Let's Groove", "That's the Way of the World", etc. I just wish Maurice White was still alive for this, I still miss him as the frontrunner of the group though Phillip Bailey does a pretty good job covering both of their vocals, nothing like the days when both men were at their vocal peaks.