Samsung has more money therefore more marketing campaigns and sales reps pushing their phones. Heck, you can go inside Best Buy and check out the Samsung mini store (actually used to work there). I think some Macy's women's now have a Samsung/Best Buy store inside as well selling Samsung phones and tablets. LG doesn't have that kind of power to have their own stores. Lots of dollars being spent to pay reviewers under the table to say good things about their phone ("check out the new HTC 11 guys, it's a fantastic phone!" for example). LG actually paid for Zack from JerryRigEverything to do a test on their G6 phone to market it's durability.
Yeah... And that didn't go to well for them...
Mac