Lets go then shall we?
Stats:
Nice and big for you to see. Anyway, as you can see, Garchomps BST far outdoes Nido's. Although Nido's is nothing to scoff at, Chompy is to powerful for it to overcome. 138 attack and 102 speed screams sweeper. Although Nido can go special and compy kinda can't, the land shark has everything it needs.
Movepool
Now, Nido still has an immense movepool. Physical or special, Nido doesn't care. It still has quite a lot of power to use, although not as much bulk as it's sister. Too name a few moves...
Earth Power
Thunderbolt
Ice Beam
Sludge bomb
Poison Jab
Suckerpunch
Mega Horn
Yeah, quite big. And next, chompy.
Dragon Claw
Earthquake
Fire Fang
Swords Dance
Outrage
Aqua Tail
Stone Edge
Not quite as much, but everything it needs. Overall, Nido has the better movesets.
Overall usefullness
Garchomp will crush all of the E4 and Cynthia, provided it's leveled
high enough. Nido is waaay to badass, and will kill anything with it's
coverage. Both can use serveral HMs too. Ima just go on all out power
and say Chomp is the best one to use. Just because of the power
Hope I helped x3
> brings in-game and that fact that is puts Nido to shame in battle too.