Use the search function (very top right hand corner of the home page) on this site for opinions....ERA vs. Unique will get you different results than ERA vs Unique - try a bunch of options. After you read, oh say 50000 postings or so, you'll have a good handle on it.
Try starting with these:
289's - ERA vs Unique
SPF or Unique or ERA - are these the choices?
http://www.clubcobra.com/forums/show...ght=era+unique
Also, visit the respective websites - there are hundreds of pages there - and you'll definitely get a sense for the difference in the flavors of the 2 companies, and when you really get down to brass tacks, visit the factory. All in all, you can't make a bad choice with these 2 - it gets down to a few more $$ for the ERA, for which you get more originality (in the area of what you can see, not underneath - where arguably they are both better than original)
Good luck.
