Boy...we are adamant, aren't we??? ROTFL...
I've had both brands and either one will do the trick. I like the AFE system, though. I think it will flow a bit better. I have the AFE Stage 1 on my truck and really like it.
Here's a tip for ya...call AFE directly on the last business day of the month and ask if they are running any end of the month specials and that you are particularly interested in that model. I got a great price on mine, less than advertised price with shipping!
In answer to your question, you are just doing the right things to improve your truck's fuel efficiency. Performance gains as a result are a secondary issue.