Wow. Dumbest comment of the year. Proved me right within yourself.
Whoa Nelly, easy there boy, don't want to burst an artery in your brain
You DO understand "power" in "power PC" is the ARch. type right?
Hence the Broadway being a single core underclocked Powerpc, while the 360 uses a triple core overclocked one.
So by your definition, all processors that carry the "PowerPC" moniker are the same; I'm sorry to disappoint you, but that is not the case. IBM has been using the "PowerPC" brand name since they introduced the PPC 601 CPU, RS/6000 back in 1994, but you can trace its roots to the MPC601, introduced in 1992 by IBM, they had to wait a couple of years for Apple to introduce a new line of Macintosh computers while the 680x0 based MacOS could be emulated to run on the newer architecture.
Since then, IBM (and Motorola briefly) introduced many new processors branded as "PowerPC" CPUs, with each new processor iteration featuring many architectural enhancements over the previous generation.
The "Broadway" CPU found on the Wii, is itself based on the PowerPC G3 architecture, specifically the 32bit IBM PPC 750CL series on a 90nm process, which was based on the PowerPC 740/750 architecture introduced back in 1997. The 750CL has 50 new instructions and a modified FPU capable of rudimentary SIMD support. This is almost the same processor as the PowerPC 750CXe "Gekko" IBM used for the Gamecube, only it migrated from a 180nm process to the 90nm SOI (CMOS) technology process mentioned before, and it runs at 900Mhz.
On the other hand, each of the three cores found on the "Xenon" CPU found on the 360, is derived from the PowerPC 970 architecture (a.k.a. Power Mac G5), released on October 2002. This line of processors features IBM's VMX vector engine (a.k.a. AltiVec or Velocity Engine, also used in Freescale's PowerPC G4, but not found on the 750 G3). They are also able to process both 32-bit and 64-bit PowerPC instructions natively. These procs also reach much higher clocks (3.2 in the Xenon) and have more L2 cache. It's suspected IBM uses the same 970 architecture for the PPE found in the PS3's "Cell" processor as well.
As you can see, both architectures are quite different, with each of the "Xenon's" fully 64bit, 2 VMX-128 units cores having a clear advantage over the old 32bit PPC 750CL G3 "Broadway" processor.
Unless "broadway" and "xenon" make them different, that must make Applebred and Thuroughbred, different RIGHT?
Seriously, don't compare useless codenames like a fanboy, and learn the mechanics of how the console is put together.
As you may see, different architectures can have the same commercial brand name, even though their basic designs are completely different. What you imply here is akin to saying that all "Pentium" processors are the same, even though a "Katmai" based Pentium II is radically different from a "Prescott" based Pentium 4.
The Xenon is extremely similar to the G5 CPU, with modifications to make it better suited to gaming, and prevent PC usage like the regular Xbox. (G5 was ofcourse, catered to Apple's needs at the time)
Broadway is no different. They are both PowerPC based.
Yes, as I said before, each of the three "Xenon" cores are not only extremely similar to the G5 CPU in their design, but derived from the very same architecture, which is on itself, not the same as the Wii's G3 PPC 750CL architecture. If you ask anyone who has been into Apple computers for the last 10 years, he will tell you the same thing.
Look into IBM's portfolio of CPU design sometime.
I invite you to do the same thing, in fact, I leave you with some interesting links that may help you better understand IBM's PowerPC architecture, and the CPUs found in both the WIi and Xbox360:
http://titancity.com/articles/ppc.html
http://lowendmac.com/orchard/05/0801.html
http://www-128.ibm.com/developerworks/linux/library/l-powarch/
http://en.wikipedia.org/wiki/PowerPC
http://en.wikipedia.org/wiki/PowerPC_G3
http://en.wikipedia.org/wiki/PowerPC_970
http://arstechnica.com/articles/paedia/cpu/xbox360-2.ars
http://arstechnica.com/news.ars/post/20061031-8112.html