DRA75P: migration J6 to J6+ in same package --> Dra744 to DRA756P or DRA746P ,

Hi everybody , 

I would like to use on a DRA744 board  J6+  for higher DDR speed  .

questions :

- are they  pin2pin compatible  ?  anything particular to take care ?

- I  see  J6+ is  about 1.3 mm  less thick  : am I correct ? 

best regards

Carlo