Cruz is the natural choice for libertarians since Rand dropped out.
Trump is many things, but libertarian isn’t one of them (nor is conservative).
Is Cruz more conservative than Trump? In my view yes. Are their critical points where I believe Trump is more conservative than Cruz? Yes.
I add everything including intangibles and I select Trump as my first choice and Cruz my second choice. I do not dislike either but feel more strongly that Truump is the person we need at this time.