OK, here we go AMD MHz(for the T-bird)/PR(for everything else) vs. Intel MHz:
Thunderbird (Athlon) vs. Tualatin (last-gen P3): Pretty damn close.
Thunderbird (Athlon) vs. Willamette (first-gen P4): Thunderbird (the Willie sucked

)
Thunderbird (Athlon) vs. Northwood (The P4 'A's): Northwood
Thouroughbred (Athlon XP) vs. Northwood (Both A and B): Thouroughbred
Thoroughbred (Athlon XP) vs. Northwood (C): Northwood
Barton (Athlon XP) vs. Northwood (C): Northwood
Clawhammer (Athlon 64) vs. Northwood (C): close, but Clawhammer is slightly ahead except in memory bandwidth intensive applications
Sledgehammer (Athlon FX/Opteron) vs. Northwood (C): Sledghammer
From the first reports of the P4EE, and also the comparison of the Xeon core it's based on to the core without the L3, show that the P4EE will be a fairly lackluster performer, with only a 5% lead over a standard Northwood-cored P4 at the same clockspeed.
From this, it most likely that AMD will hold the title of "Fastest Desktop CPU" until the arrival of Prescott, at which point the leader may change.
I'm waiting for the San Diego vs. Tejas battle myself :devil: