about Ultra-sparc and alpha: what makes the difference?

[Zhang Weiwu]

Hello. The question sounds really silly, but google with "compare sparc 
i386 alpha" / "benchmark sparc i386 alpha" doesn't give meaningful 
result in several pages. Please suggest me a better keyword compilation:)

I don't know about anything other than i386, but the sparc servers and 
alpha servers are much more expensive than i386 servers on the same 
clock rate. People keep telling me "they are expensive because they are 
more advanced", but I prefer to read some comperhasive data, benchmarks 
and such like.

Thank you.