I just answered my own question. I compared taps and sound quality and in my case the Vandy 2CIs sounded vastly better on 8 ohms with a fuller sound and more bass punch. Thanks for all the feedback on this subject.
4 ohm vs 8 ohm taps
I just had my CJ MV75A1 tube amp rebuilt and the tech put on new binding posts and put the 4 ohm taps on them. I always thought 8 ohms was the most common but I dont know much about this subject. Two two sets of speakers I would use with the amp are either my Vandersteen 2CIs or my Klipsch La Scalas which with the new crossovers are 8 ohms . My other amps are all running the 8 ohm taps right now. I could use enlightening on this whole subject. Carl