One test is not necessarily better than the other....you have two long acting (which are virtually the same) and two short acting.....really depends on your goals and what you're using it for (ie contest, bulking, etc.....)
Testex! My absolute favorite test. But looking at the price I´d go for nile sust, I can bet those for 4 Bucks a piece, compared to 7 dollars for the testex cyp.