the white one looks like a hack job, the red one looks like time was really spent on it.
OP, if you do it right, you'll have a car that not alot of people have and would look sick, I agree, I like the 6th gen front ends(the 99-00) better than the 5th, but it's really got to be done properly.
I agree with Honda9206, go with certifit parts, yeah their not genuine honda but really who can tell the difference by just looking at it? and if you f**k up, you'll have saved yourself a bunch of money. I was looking at a 00 front end conversion for a buddy who has a 97, and if you go with certifit, you can get everything for just under 300, that's not the Si though cause I don't think they have that, but it's just the grill, you could get a new grill from honda or ebay...or even craigslist.
Good luck, and just know, your taking on a big project so do a lot of research and know what your getting into. also if you don't have any experiance with body fabrication you probably won't succeed since it's not like just swapping the parts out like doing a 96-98 front to a 99-00 front.