You need to narrow it down some more for us...
In terms of raw core performance, it appears Intel has the lead and is gaining. There is nothing new in Barcelona.
In terms of cache architecture, Intel has had a shared last level cache with Core, and Tulsa as well. There is nothing new here.
In terms of scalable interconnect (ala HT), from all appearances Intels CSI will put HT to shame. It will be faster, and more scalable thanks to the directory.
In terms of homogeneous versus heterogeneous core architectures, and integration of said cores, I think Intel has the lead here as well.
or is it something else?
--Alan