>Assuming all things equal (clock speed, HSF) will the greater
> wattage directly translate into higher temps?
No. Thermal density matters too, when it comes to cpu temperature. Venice is smaller than San Diego, therefore has to dissapate its heat on a smaller surface, which should result in higher core temps (for equal power). However, the majority of this effect is negated by the heatspreader and the heatsink (assuming both being equal), but since no heatsink will ever achieve a infinite thermal conductivity, a 80mm² 80W chip will be (ever so slightly) hotter than a 100mm² 80W chip.
But this is an academic discussion, rather than a practical one. Because there is not only the heatsink effect, there is also the fact that cache consumes considerably less power than the cpu core per mm². San Diego and Venice have identical sized cores, and I estimate at least 90% of the power is consumed there, and not in the caches, so really, any difference would be nearly impossible to measure, but in theory the smaller chip will be hotter than the bigger one, all other things (especially power consumption and cooling) being equal.
Finally, the die temperature may not be your biggest concern, but the heat created inside the box, that needs to be moved out might, and there 80W is 80W regardless of cpu size or core temperature.
I hope I didn't confuse you too much, but if I did: just get a Venice core
= The views stated herein are my personal views, and not necessarily the views of my wife. =