I was more wondering where you saw the comparisons being made in vs scenarios in particular.
If you want to get technical about the author stealing from dnd its more then just that, the organization of magic items is straight dnd, freedom of movement, wish upon a star, scream of the banshee, shockwave, gate, raise dead, aren't just named similarly but do the same things ect. Even the tiering system of overlords magic is a bastardized version of dnd, the alignment system is a stripped back/simplified version of dnd, simply removing the chaotic/lawful aspect. Super tier magic and the way it's gained/progresses is heavily ripping from the old epic spell system iirc.
This is all because the beginning of overlord was literally the authors dnd campaign group stopped hanging out twelve years ago so he built his own story/world/characters to fill the time.
Now to say this makes them comparable to dnd/scalable is silly but the author unabashedly did steal half ainz spell list from dnd proper, with slight tweaks to names wherever he felt he'd get in trouble. With addition of whatever the hell else he wanted.
Id say the biggest difference between overlord and a lot of other fantasy inspired by dnd is how abashed the inspiration is. The author straight up stole chunks of dnd he liked and grafted into his own bizzare magical world.