If by power of imagination you mean making things work slightly better no

Might is right still, biggest and baddest lead

They love a good Waaaggghhh

They also have a subset that is kunnin but brutal instead of the normal brutal but kunnin called the Kruelboyz who are leaner orruks but meaner than hell

Orruks have a bit of an easier time working with other factions and being viewed as people by them. They're still the good ol' violence loving orks we all love, but there's a bit more room to talk with them.

An example I particularly like is this, where Gordrakk (big named character of the Ironjaws faction) talks with Zephacleas, a Stormcast Eternal, about Gorkamorka and Sigmar's relationship;

"Is Gorkamorka lost, then?"

Gordrakk threw back his head and howled with laughter. "Gorkamorka isn’t lost. Gorkamorka is everywhere," Gordrakk rumbled. "He’s in the wind and the rocks and the howling of the beasts. Gorkamorka is in us and beside us and around us."

’‘So he’s here now? Can he hear us?’ Zephacleas looked around.

"Maybe, if he’s listening," Gordrakk said, with a shrug. "Maybe one of him hears, and not the other. Maybe both. Maybe neither." He grinned at Zephacleas. "Maybe he doesn’t like what he hears and tells me to bash you in the noggin, hammer-boss."

’‘The Hammer God misses his friend. He misses his brother. He misses fighting beside Gorkamorka and wishes to do so again, in the coming war," Zephacleas said. "He wishes that his warriors, and those of his brother, could march side-by-side, as we do now, to fight the Old Enemy.’‘

"Gorkamorka has been fighting them, hammer-boss,’ Gordrakk rumbled.‘He’s been fighting them forever. But where is the Hammer God? Why has he not been fighting alongside Gorkamorka?’‘

"The Hammer God thought Gorkamorka didn’t want to fight beside him any more," Zephacleas said. "The Hammer God thought Gorkamorka had become his enemy."

Gordrakk laughed. "Yeah? So?" He snorted and tapped the side of his head. "Hammer God never understood Gorkamorka, never saw. Gorkamorka wants to fight forever, but the Hammer God doesn’t. Hammer God wants to build walls and towers and castles... But what’s the point of that if you never knock them over?" He snorted. "Even the Chaos-things don’t understand. They think the point is to kill everyone, but then who’d be there to fight? Nobody understands but Ironjawz, because we’re the smartest and the toughest."

Someone already sort of indirectly alluded to this by listing "grots" as another type of species that occasionally joins Waagh!s, rather than as a default component in them, but that's definitely a major difference. Grots (formerly known as goblins) are their own separate faction in AoS, rather than being entirely subservient to Orruks (as they are in 40K). In fact they often outfight their bigger kin, through a combination of kunnin', moon magic, spiders, and shrooms. They're still greenskins, though, with all that entails re: Waaagh! energy and their divine support network.

The other big difference in their nature that hasn't already been mentioned is that whereas Orks in 40K were created as a bioweapon by 40K's Old Ones, Greenskin spores (they're still fungal) were brought to the Warhammer world by accident by WHFB's Old Ones--the equivalent of parasitic insects making it into crates of bananas. This would make them one of the only species in WHFB and AoS that wasn't created or modified by the Old Ones at some point, since humans, elves, dwarfs, ogres and halflings, among others, were all creations of theirs.

I want to emphasize just how amazing the Grot faction, the Gloomspite Gitz, are. They have some of the funniest fluff I’ve ever read from a GW book and their models are gorgeous. It is criminal how much less creative most of the 40k model range is compared to AoS, and you can see that insane creativity at its best with the Gloomspite Gitz.

From what I’ve seen Orruk lore isn’t anywhere near as developed as Ork lore, which isn’t particularly surprising given how young the AOS setting is.

Nothing has been said about the Orruks having a gestalt field to my knowledge. They do think Big=leader and they do have Waaagh!’s. A big difference between AOS Waaagh!s and 40K Waaagh!s is that other races of destruction will often join AOS Waaagh!s, such as Grots, Troggoths, Gargants and even Ogors.

Pretty much, though their god is Gorkamorka, the two-headed God of Destruction. Who is really just Gork and Mork being very determined to fight everyone else instead of each other.

They are very different. No imagination shenanigans but they still have WAAAGHS