Yagarto or Code Sourcery

Hello,

I have some older projects built with an early version of Yagarto, chips 
are LPC2106 and LPC2148.
Now I want to continue these on another PC and need to install the 
toolchain again. I am thinking about changing to Code Sourcery because I 
am also interested in Cortex M3.
Can anybody help me on these questions:
- Will older projects compile on newer Yagarto version without problems?
- Will Yagarto projects compile on Code Sourcery Lite? (or what changes 
might be neccesssary?)
- What are the differences between Yagarto and Code Sourcery concerning 
ARM7 ?(only refering the compiler, linker, libs and so on, I am using 
programmers notepad as an editor and don't need a debugger)

Thanks a lot

Martin