I think these kinds of views should ideally be as identical as possible. I get the point of liberal views vs conservative views and even more the ideas about why you have a professional life/career.

I don't think there is much point into really debating this with the goal to chance his views, unless you both like debating your difference.

I think for me it would be difficult to be with someone who isn't a liberal socialist, isn't a vegetarian, and isn't fascinated with science up to some point, and sees the power of the scientific method.

No one can tell you if you and him are too different. Also, you mention a lot of good points. No guarantee that a person that does share more similar views has those qualities as well.

I also wonder if you actually give him a fair judgment here. Like you say he is not empathic, but he is nice to everyone. When he says he wants to retire early, is that his logic talking, or his passion? Quite some people that are engineers are so out of passion, not out of money.