Different Developers, sale publisher. So YES the game is different. Compare it to Mass Effect. Play as one character and control others thru commands. Simple right? Somewhat.
Mechanics are alright. Moderate Auto Aim, overheating on blasters, quick reflexes and of course which character to use for what enemy. Now all of them have a weakness which the tutorial will show you how. Downside was the jet boots. Only got for short jumps? Lame.
Graphics... HOLY S*it!!! PS4/PS5/XBox... who cares?! Take a minute and just admire how much damn work these people put in to make this ascetically pleasing, visually captivating. Granted it's no Marvel movie but you get a moment to really enjoy the work. The detail is pretty massive.
The characters themselves are all motion capture which you'll notice, nothing spectacular but what you do notice is the dialogue between all the characters. Just the normal back and forth between traveling. Especially Drax. He's more witty and somewhat intelligent.
Soundtrack. It's GoTG. Do I need to say more?
Just know the runthrough is anywhere between 18-25 hrs. Yes the decisions affect some parts of the game so choose wisely. But overall. It's comedic, upbeat, just single player fun. No BS. Just fun.