The Infinity Mini did not replace the F6. We just added it as another option to our product line.
We now have the F5, F6, Infinity, and Infinity Mini. The Infinity and Infinity Mini are programmers, whereas the F5 and F6 are chips. They install and function a bit differently.
Chips plug into the PCM direct via the J3 port. Programmers flash the computer through the OBDII port. Chips are switch on the fly, and programmers are not (engine must be off to load a new tune).
Both kinds of tuners have their own benefits, but the actual tuning is the same on all of them.
The PL version of our tuners is a great choice for a guy planning to stay pretty much stock with the exception of small mods (intake, exhaust, ww, etc). If you ever plan to do larger injectors, build up the trans, run water/meth, etc., then it would be better to just pick and choose the tunes you want since you will have to get them built custom later (PL tunes cannot be modified).
If you have any questions, I would be happy to help you out. Give me a call.