How that bridge is different from WinUAE running on XP? I mean, there you can start your favourite game by clicking a sortcut on your desktop. UAE launcher for AROS is not (yet) much...
There is only a practical difference. Scripts you're talking about generally launch UAE with a customized configuration file, in order to create the right emulation environment for that game. We can call this a sort of "ADF-oriented" script.
AmiBridge goes little further, modifying the S: files in the emulation environment. So I prefer to call it an "application-oriented" script. Maybe future revisions will allow to create different uaerc.config files for ADFs, but writing another GUI for e-uae was not my primary goal.