Oliver Queen is the Green Arrow and he is Seattle's (Or Star City as it is also sometimes called) daring vigilante protector in the world of DC comics. Unfortunately for Oliver when you're a rich former playboy that dresses up in a costume and beats up bad guys without superpowers everyone and their mother is fast to draw comparisons to Batman.
Now some of those comparisons are justified, both Oliver and Bruce make up for the fact that they don't have superpowers by using high tech gadgets to even the odds. The critical difference between them comes from the fact that while Batman is renowned as being the worlds greatest detective and for being a highly logical thinker; Green Arrow on the other hand is not that, he's emotional and passionate and impulsive, and that makes him a substantially more real character in my eyes.
Oliver has always felt like a more animated character than Batman to me, maybe it's because Oliver is canonically a liberal loudmouth which always strikes a chord with me, I've always found it super interesting when comic book characters actually have solid beliefs about the world. Honestly I think it comes down to the fact that 'Prep Time' is quite possibly one of the most annoying things in comics.
Batman almost always has a plan and while sometimes that can be used as a great writing tool, other times it comes up as essentially making Batman have superpowers without actually having superpowers.
In my eyes this can make batman seem kind of overpowered and dull, meanwhile in DC Rebirth Oliver is outplayed and outmaneuvered almost instantly, and is truly forced to go through an intense physical journey of self discovery. At the end of the day for me Green Arrow is just a substantially more interesting character for me to read about, also the goatee?
Truly Iconic.