I don't even think it's REMOTELY close.
Not only are the rates much higher and you're not actually likely to hit pity/spark all the time, you're also not bound to FOMO as unlike Genshin, the vast majority of Nikke's banners enter the general pool (exception being limiteds and collabs) and there's a wishlist system meaning the pool doesn't get diluted with more units as the wishlist will always guarantee one of those 15 (with the exception of the Pilgrim unit pool).
For Pilgrim banners, since they seemingly only happen 3 times a year (New Year, half anni and anni) you can just save up a spark for them and not even have to bother rolling on their banner. That's what I did with Crown.
Dupes are also wiiiildly less important in Nikke. Nikke MLB changes so little, I was pretty surprised when someone showed me lb0 10 friendship Crown vs lb3 40 friendship Crown. It was barely different at all. Cores change even less. Meanwhile in games like Genshin and Star Rail, you could be playing a completely different character with a different playstyle at C6.
That's again, also not even mentioning the weapon/lightcone gacha which you know, is still there and also is a relatively big difference.
I could not care less about how you can complete all the current content with 4*s or c0 characters and don't need their lightcones. Those people with C6 are playing a completely different character than the people at C0 and it sure looks like it's a lot more fun.
Oh yeah also Nikke is actually a lot more generous on top of the better rates and less important dupe system.
The part where Nikke truly becomes predatory is less its gacha and more its level system, encouraging people to spend to gain more levels as that's where the big power difference actually comes from. Like for example splitting up the playerbases in a shitton of mini servers in content like PvP, encouraging them to spend so they can stay at the top in their server. And its completely unnecessary 160 wall. I don't understand why it's there.