Better as far as what? LiFes are heavier for the same capacity and have a lot less voltage, 3.6v/cell fully charged versus lipo at 4.2v/cell fully charged.

Thats backing up in my book. Lifes are great for rcvr and tx pacs (in some cases), but are lacking as a main power source.

Plus, lifes seem to need a 20cycle break in and limited charge and discharge rates while in the break in period.