Both processors are clocked at 3.2 GHz.
The similarities of the two processors ends there. The xenos processor has 3 identical PPE cores where as the cell processor has only 1 PPE core and 7 SPE cores.
Cell Processor
-  One general purpose PPE core that is used for the OS and the game application.
 
-  512 MB total memory on 2 buses which can be accesed directly only by the PPE core. 256 MB of processor main memory and 256 MB of memory used by GPU.
 
-  512 KB L2 cache for the PPE.
 
-  32 KB L1 instruction cache and 32 KB L1 data cache for the PPE.
 
-  7 specialized SPE cores. One is used for the OS leaving 6 for the game application.
 
-  256KB SRAM per SPE. No common memory between SPEs and SPE cannot access the PPEs main memory directly but the PPE can access the SPEs memory directly.
 
-  Communications between SPE memory or to the PPE memory is performed via the Element Interconnect Bus (EIB) by either accessing ports or via DMA.
 
- SPEs do not have branch prediction capability.
-  3 General purpose PPE cores that are used for the OS and game application.
 
-  512 MB main memory that is shared by all three cores and GPU.
 
-  1 MB of L2 cache that is shared by the 3 cores (333 KB per core average).
 
-  32 KB L1 instruction cache and 32 KB data cache for each core.
 
- 2 Hardware threads per core.
The physics will be better than LFS in GT5 besides. Hard to comprehend but it will.
For the record:
My system specs are
AMD Athlon 64 4600+ x2 939 @ 3.0ghz
Evga 8800gts clocked past 8800gtx ultra specs.
Asus A8N32sli Deluxe
4gb A-Data DDR400 2.5-3-3-6
Xfi Xtreme Gamer Pro
OCZ GameXtreme 700w
XP 64 Pro
