I haven't read the manga nor ones webcmic but I know 100% it wont disappoint especially because the first season was well received and I am sure more money will be invested in the production of the second season which will hopefully increase the quality, not that the first seasons quality was any bad XD
Since the anime's coming out you don't really need to read the webcomic or the manga. But I'd still recommend it, especially ONE's original webcomic. There's just something about ONE's crude drawing skills and his style of humor that blends perfectly. The humor of this scene will probably feel different in the anime because of it's look.
It's not a huge loss and it ultimately doesn't matter but I still find ONE's shitty drawings add a lot to the overall humor.
Metal Bat is basically a Joestar, can't wait for Fighting Spirit™
Metal Bat is basically Josuke, if Josuke was perpetually pissed off about people dissing his hair.
I still haven't seen the first season yet.
You should definitely give it a watch. It's a pretty funny show that flips a lot of tropes on their heads. But it does it in a very tongue in cheek kind of way, it doesn't get self-righteous or obnoxious about it. It feels like everyone's in on the joke.