Well Laravel policies are nothing but grouped gates, so it's Policies vs Laratrust, and for a simple project I would go with Laravel Policies and avoid any kind of packages, but once the project gets bigger the better option is to shift to Laratrust for a simple reason: the code is being tested and maintained by the community all I need to worry about is applying it, so less debugging and waste of time.
PS: have a look at this package 'laravel-permission', a much bigger support and has a lot of features as well.
@priyalaks Yes I do recommend Laravel-Permission over Laratrust, it not better* but you don't have to worry about a package with over 10k stars on Github and being actively maintained by the developers and the open source community.