Well component was originally invented in the UK by BBC
AFAIK to allow easy conversion to B&W
Well my TV is definately RGB from Scart to tube with no conversion - same with the DTTV tuner - makes pal look bad!
There are no SVM artifacts on any RGB source, I have use SVid sources and I was unimpressed.
As to projectors using component - broadcast standards again, also a world standard RGB is a computer and Europe standard
My old 25" TV (one with DTVA) doesn't do NTSC via composite, but does display RGB 525/60i - also I was unable to tape (a test thats all) and the head motor was going ape.
Theoretically using top end components via similar cables RGB and Component would be identical and SVid would be noticably worse