Lupe is basically this generation's Canibus.
Like Canibus his fans will swear to you he's the greatest "lyricist" and "technical rapper" but ultimately these terms were already irrelevant when Canibus debued let alone in 2020.
None of this shyt means anything unless it equates to strong music. Lupe's music has become increasingly become more opaque and less memorable. It's now niche music. The hip hop equivalent of prog rock. Technically brilliant but utterly self indulgent and only appealing to a small hardcore group of fans.
So if you wanna say he's technically better you can have it but it's a title that means very little at this point in the game. It will be Kendrick's music that is remembered and praised in the decades to come. Lupe can have his little weird corner of the Internet just like Canibus.
		
		
	 
Even then, I think after a certain point using a bunch of literary devices or word play isn't in the least bit technical.
Writing album long concepts, well written song concepts and employing dope grooves & rhythms
while being musically and lyrically above par and STILL funky/tight and unabashedly Hip-Hop is
when an artist truly reaches that realm of impressive.
I think and I've said it before but a dude like Skyzoo for example really doesn't get his due for being so musically consistent.
Sonically. He's fukking with guys with ten times the budget.
Lyrically. His pen is undoubtedly sharp.
Conceptually. This dude isn't just rapping and stringing together a bunch of bullshyt or to bring
it back to your post noodling incessantly at warp speed on an electronic guitar and ultimately
musically saying jack shyt. He's actually using his skill to say something, not "rapping about
rapping". 
People on this website often don't judge writers in Hip-Hop as a whole they just talk about
"Them bars bro!","What about that simile man ?","Yeah but...he rhymed door hinge with orange!".