Here are some statistics to give you an idea:
NGFB v6.21.0 : 17354 lines in 68 files, with 81 classes and 554 functions
WPSSO v1.21 : 13860 lines in 49 files, with 52 classes and 417 functions
You can configure NGFB in a similar manner to WPSSO (removing all social sharing button features) by adding the following code to your wp-config.php file:
NGFB will continue to focus on its core functionality — meta tags and social sharing buttons — while WPSSO will focus on meta tags and a few other advanced social sharing protocols / standards (more on this in the coming weeks).