Any major differences between the 1/8 scale technic cars? And what they all include in general?

In terms of additional features and functionality. I plan on buying one soon, though not sure which car I’d want to buy. From what I know, they all have a functional transmission and detailed engines with moving pistons. But are there any that have extra features compared to the others? Could be anything. Plus, I’m not sure what all features these cars have. So if you guys could inform me on that, that would be great. This would by far be the biggest set I’ve had, and I want to make the most...