The ol-all.json and ol.json build configurations differ only in their use of the manage_closure_dependencies Compiler option. I don't think there is value in running both (there are plenty of other compiler options that we don't exercise in this same way).
Build configs
This directory includes configuration files (json) for the tasks/build.js build script.
Notes:
use_types_for_optimization is set to false for the SIMPLE and WHITESPACE
builds. If it was set to true we would get function names like
ol_control_Control_prototype$setMap in the compiled code when using the
SIMPLE compilation. use_types_for_optimization is only appropriate for
ADVANCED compilation. To be sure we also don't set it for WHITESPACE.