difference between option 1 and option 2 in 1152-Pin FBGA package for ARRIA 10 SOC

[Altera_Forum]

Hi, 

I'm a new member of this forum. I'm a HW/FW designer. I'm developing a schematic based on ARRIA 10 SOC. I choosed the 10AS048H434I3SG device (1152 pins, 35mm x 35mm). I saw there can be also 10AS048H435I3SG with the same package.  I read the package information datasheet and it talks about an opton 2 on the same package 1152-pin FBGA. Can you please explain me the difference between option 1 an option 2? thanks a lot!!! Massimo