Luminara

Every power in the game has base stats, which are subsequently modified by AT. The base stats are available. The modifiers are, as well. Excluding whatever has been added or altered in this restarted version, almost everything about the mechanics of the game, all of the tables and equations we were using right up to shutdown, is known and should still be available. All of it. Hell, I have most of that data on a 3.5" HDD, but since I don't have the power to run a desktop computer now (or have a desktop computer, for that matter), and don't have a laptop (or an external SATA adapter), I can't access it. Try the Wayback Machine. If I recall, it was Iakona who posted the comprehensive list of tables and base stats I used to create the power value information in my guides. That's probably a good place to start. Once you have that, you really don't need a "sim", the calculator app on your phone or computer will be the only tool necessary to compile the comparison data you want.

On the contrary, it's a question which cannot be answered without specificity. Each AT has... what, 100+ combinations of primary/secondary, each of which will perform differently, plus pools, enhancements, accolades, the testing field (critter defenses and resistances, level differential, etc), attack chain and a host of other things to take into consideration. Attempting to compare them based simply on the AT designation, like one would compare classes in traditional RPGs, is moot. It doesn't work because the sheer number of variables is too large.