N95, N96 dual CPU, N97 single? Dual CPU s60 5th ed...

I've been playing around with Nokia's new QT development stuff. It's all pretty neat. It would be even better if I could use it to develop for Symbian under Linux or Mac, but that asides..
I came across a list of platform types:
Installer for all S60 5.0 (5th Edition) devices with a single CPU, such as the N97 and 5800 XpressMusic
Seems reasonable, but I also saw:Installer for all S60 5.0 (5th Edition) devices with dual CPUs 
Hmmmm.. dual CPU S60 5th edition? 
It lists some S60 3rd edition dual cpu phones too: N95 and N96
So, why exactly is the N95/N96 dual cpu, but the N97 isn't? Sure that was a step backwards?
Interesting though.. I wonder what the first dual CPU S605th phone will be? Presumably, something faaar better than the somewhat dull N97! I mean, honestly.. who wouldn't put a decent GPU in their flagship phone? presumably the same people who would put OS storage in double digit MB.. grrrr ..

I aggree, however I'm not sure these devices are frog leaping to that extent.
In the case of the N95, the dual core refers to core CPU and an additional DSP and GPU
N95: OMAP2420 - 330 MHz ARM1136 + 220 MHz C55x DSP + PowerVR MBX GPU
The N97, however,is of the same architecture (ARMv6) but with a higher clock rate (434MHz) It isn't a new generation chip per se. It's just running faster.. and without the GPU.. 
The N96 is a bit different.. Apparently the difference between the N95 v N96:
CPU: N96 has dual ARM9 264MHz with no floating point instructions (N95 has dual ARM11 332Mhz with vector floating point or graphics accelerator)
So, the N97 has the speed of the ARM11 from the N95, but all of the same missing features as the N96.. more or less.. 
This makes the prospect of a dual cpu s60 5th all the more intriguing
(thanks to wikipedia)

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