Pogba is widely more highly regarded as a super star level potential because he shows he is a big moment decisive player in his qualities he has. Verratti has had great CL games dominating wise for sure (more so then Pogba), but the main thing he lacks is what Pogba has naturally. The ability to step up when you are needed (not alot but enough times) and grab the big moments by the horn and make it your own. The individualistic asserting and willingness to be the key decider.
Verratti is decisive in build up and making things tick effortlessly, but in more subtle general play kinda way instead of highlights reels type of plays. He is more like a young Xavi who was never much of a attention grabber on the natural sense on the pitch, never had the confidence to be to go to guy final plays type (notice I said young Xavi, he is a player that took many years to become the maestro he is known as, I remember first half of his Barca career, not so confident and was ok with hiding in background as a fantastic role playing CM while Deco took center stage) . Which is absurd since when you watch Verratti you see he plays with extreme confidence.
But it doesn't carry over to the final third and highlight level assists or goals. Pirlo naturally did witth constant long through balls or set pieces. Verratti has the ability to make those long balls on a dime to attacker, but not the playing style, as said he is more of play the channels and make things tick with close ball control and short passing style as Xavi was. Not entirely, more like a hybrid of pin point quarterback passing Regista and mobile big picture type of CM, but he prefers the latter for sure it seems (like Xavi, he is the type who would have tons more assist if you count it hockey style, give assists for assisting the assister lol). You see him for Italy and notice that even though he is easily by huge margin best player in ability, is not natural in wanting to take the lead and say everything goes through me. More of a shy system / orchestrating build up player. While Pogba in good and bad times has to be the center of attention and is willing to take on the responsibility of being to go to guy, even if he isn't fully developed yet and might not be totally equipped for the big burden. Don't wanna continue with the Barca comparisons, but while Verratti is Xavi type, Pogba is more like, in profile/confidence NOT ability or style, more close to a Ronaldinho type.
So basically it's easy to know why most would see Pogba as the bigger name and more highly sought after /highly regarded one, he is a phenomenon in the star player level that your average viewer can easily notice, while Verratti is the not as noticeably comfortable big moments profile player while still easily being in similar amazing level talent wise due to the influence he has on his team's build up. He just needs to unleash himself and become more direct in his offensive production to get more attention.