KRS and I have explained why multiple times, so I'll just repost what I said on
KRS-One did not want to dilute his message when he spat on the mic, but if you listen to any of his raps from the early- mid 90's would easily prove your point moot and invalid, I'm just going to use Sound of the Police as an example as it's a fairly well known song.
Now here's a likkle truth
Open up your eye
While you're checking out the boom-bap, check the exercise
Take the word "overseer," like a sample
Repeat it very quickly in a crew for example
Overseer
Overseer
Overseer
Overseer
Officer, Officer, Officer, Officer!
Yeah, officer from overseer
You need a little clarity?
Check the similarity!
The overseer rode around the plantation
The officer is off patroling all the nation
The overseer could stop you what you're doing
The officer will pull you over just when he's pursuing
The overseer had the right to get ill
And if you fought back, the overseer had the right to kill
The officer has the right to arrest
And if you fight back they put a hole in your chest!
(Woop!) They both ride horses
After 400 years, I've _got_ no choices!
The police them have a little gun
So when I'm on the streets, I walk around with a bigger one
(Woop-woop!) I hear it all day
Just so they can run the light and be upon their way
I think that the battle between LL and KRS is something of a divide between ages but maybe more so between what elements are important in hip-hop. Is it better to stick to the core tenets laid down by the originators and pioneers. If you believe that then you tend to lean towards KRS. If you believe in the ability to adapt and change with the times, maybe a little more of a bombastic style maybe you prefer LL.
But either way, KRS if anything was an underrated lyricist. He may not stun you with jaw gymnastics or write using slant rhymes or multis (he can and has but it's not a hallmark of his style), but KRS is a stubborn old goat and you need that in the hip-hop game. When the music is getting softer and the pants are getting tighter. When hip-hop is becoming more rock influenced than soul influenced, when the music is more commercial then it's ever been, we need someone who sticks to the old ways, stayed disciplined and still gives lessons to the youth and KRS has been doing this for almost 30 years now. He can sometimes be preachy, I'll admit that though.
I guess I'm saying my piece for KRS-One, but LL is only a couple of spots down though. Both are Gawd MC's though.
I love KRS-One and his BDP and Solo catalogue are stong, even a lot of his recent sh1t is solid to near classic