Isn’t what Trump is saying basically what Cruz has said?
No.
Not at all! Trump is saying basically what Bush, Christie, Fiorina, Graham, and Kasich (and, I'm presuming, Pataki) have said. Cruz, on the other hand, has spoken out strongly in defense of religious liberty and against the unconstitutional Supreme Court decision.
Not even close.
What he said:
““Today, judicial lawlessness crossed into judicial tyranny,” Senator Ted Cruz, Republican of Texas, said in a statement.”
http://www.nytimes.com/2015/09/04/us/kim-davis-same-sex-marriage.html
BIG difference.