Chosen Solution

if so, is there a difference in difficulty?

u2r5150, compare the S5 guide on here with the S5 Active one on here. Only you can make the determination with what degree of difficulty you are comfortable with. The display assemblies are different.

Can you use a Digitizer from a sprint s5 sport which is sm-860p and replace the cracked screen of a at&t s5 active sm-g870a ?