The reason for the 2 different downloads is because it does primarily
depend on what version you already have. When The initial update to VoLTE
was released, it was intended for State of WA customers. However, you
could still update if you lived anywhere if you used Kies on the computer.
If you didn't live in the state, you did not receive handset notificiation
that an update was available. For those that didn't receive that update,
or had an even earlier version of the handset software, then the latest
update that is meant for everyone, those people would receive the Larger
File size. People like myself who Live in NY but did update to the last
update, meant for WA market, through Kies, the Latest update was small
because I had just about everything that was needed aside from the latest
update.