Here is a more in-depth piece from a former Cruz supporter who now supports trump. Maybe more in line with what you were looking for.
politijim.com/2016/03/why-jesus-would-endorse-trump-and-why-i.html
Some highlights of the article:
(paraphrasing) Cruz gears himself to a very narrow group of people and comes off as bible-thumping, holier-than-thou. Will not be able to win in general election.
" The basement is invested with rats, cockroaches and termites… What is needed is someone who won’t any longer allow the media or the RINO/DEM big government cabal to stop us from passing obscene budgets, terrible trade deals and keeping the borders open like FOX, the Speaker of the House Paul Ryan and the George Bush infrastructure that runs Ted’s campaign want to do."
The article is very detailed and gives criticism of Trump as well. It was written by a person with religious conviction and who worked hard for Cruz’s senate campaign.
I think it’ll give you a very good idea of why people choose trump over cruz.