Too each their.  100 hours is short....  not for me, but perhaps for you.  Some of my all time favorite games are roughly 10 hours.  100 hours seems like a lot for game you don't love.  

Bloodborne = a successful and respected title by Sony. Ronster316 = criticizes Sony at every turn. Yes, we've seen your posting history. Nothing new. I did buy into the Bloodborne board game on Kick starter. Looking forward to 2020.

Meh, Nioh was shit. Boring bosses, boring setting and repetitive enemies. Doesnt belong with these other 2. Sekiro, on the other hand...
But more on topic. Honestly I got bored with Ninja Gaiden Black, havent played in years, but i'd def. pick Bloodborne over the other 2. Nioh as I said I consider a mediocre game and Bloodborne simply has more fun gameplay, better setting, amazing lore and just overall great atmosphere. Everything checks out well.

Are these 2 games even comparable?

I'm not sure there's a single boss in Bloodborne that would take 20 minutes.

This thread also reminds me that I need to finally play through Nioh.

I replayed Bloodborne around a month ago, and I consider it one of the best games ever made. The gameplay, music, world design, visual design, bosses and lore are among the best I've ever seen in any video game.

I can say I really didn't like the game, but well to each its own.

If you want to say "poor man's Ninja Gaiden", that's your opinion. But to say "poor man's Nioh" is ridiculous considering Nioh came out 3 years AFTER Bloodbourne.

Hell, I love both Bloodbourne and Nioh. But let's be honest here. For as good as Nioh is, a good amount of that content feels like it's padded to make the game longer.

It's a very overrated game but admittedly I've never gone far because it always felt like a big step down from Dark Souls in terms of quality.

I just wish that From Software would either stop making similar games all the time, or would make one that takes all the best elements of the Souls games and does the series better than any of them. As it is, they just seem to get mostly worse since Dark Souls.

I am in the camp that Souls is better than BB. Souls is just amazing, BB is very good. Sekiro was awful. From has gone downhill with Sekiro, at least for me.