is my puppy a APBT or an Amstaff?

Hello I am new to this forum so i hope i am doing this correctly. My question is simple is my puppy an APBT or Amstaff? I got him about a month ago and i know that both breeds are virtually the same but which does he ressemble more ? thank you i will post pictures of both parents and him. thank you inn advance

 

Dad looks like a amstaff, bully or a bulldog mix of some sort and the pic of the mom is not that good. But it is all just a guess. Just out of curiosity what difference does it make to you?

 

it doesn't matter to me so much . Just out of curiousity, I chose him because of his temperment. I am hoping to get him to become my service dog. I guess another reason I want to know is because his dad was tall and lean but he was the runt .i never saw the mom in person so i kinda wanted to get an idea as what to expect . thanks for the help

 

it doesn't matter to me so much . Just out of curiousity, I chose him because of his temperment. I am hoping to get him to become my service dog. I guess another reason I want to know is because his dad was tall and lean but he was the runt .i never saw the mom in person so i kinda wanted to get an idea as what to expect . I heard the dad comes from the "butthead and razor edge" bloodlines . now i am not a big fan of all the new and cool "bloodlines " but what does that mean exactly? thanks for the help ......sorry my family has always had rotties,boxers pit mix,english bulldogs so all this is fairly new to me