I personally would go with the LT because the only thing it doesn't have that the AM has is the All Metal Feedneck, Eye covers, and Grip frame. These can be upgraded later for like $120 i think... The composite material that the parts are made from is very durable and has the same strength as the aluminum. One advantage to the AM Grip frame is that it is big enough to house aftermarket OLED boards such as the Emortal. The LT can still accept aftermarket boards, but these boards will have the tricky color coded LED settings.
Tell me if you have any more questions,
Mason