Dan3: if you look at the .13 PIII, consider how much effort had already gone into refining the layout of that core, then look at Banias and what space taking additions were made, it's hard to see how that could have been done on the same process.
Tualatin was the product of a completely different (and, from what I understand, much smaller) design team.
Banias was made by Intel's Isreal teams, the ones who (almost) gave us Timna. I doubt if Banias has much in common with Tualatin. More likely, it's a completely Timna redesign, with most of the integrated features removed.
Tualatin was a stop-gap 130nm solution, needed to fill a particular space in the market until the arrival of Banias. I wouldn't be surprised if Tualatin was little more than a CuMine "dumb" shrink with prefetching being the only real addition.
-fyo
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