Selecting the software is much less important than selecting the tuner. Go with the software that your tuner is most comfortable/skilled at using. If you're planning to do any of your own tuning, you might want to consider that fact that TTS requires you to store your laptop on the bike in order to make data recordings whereas the SEPST software from HD has a small storage device (VCI) so that you don't need to strap a laptop to the bike. For some bikes and home users this might be an important differentiator.
Since your bike is a 2003 you shouldn't have any warranty issues but for those that have a newer bike this might be a consideration for staying with HD's software.
Great helpful discussion, everybody!
So, simply . . . I want to do my own tuning and do not want to carry my laptop while traveling (to record date) . . . do not want the SEPST storage device (VCI) . . . just want to connect and play a little with it myself. No warranty issues with the 03 SERK I have . . .
so . . . I bought the bike used (with only 3700 miles on it) last year. Came with V&H ovals, looks like the stock breather on it . . . but it feels like it was never remapped by the previous owner . . . I am only getting about 27 mpg on the 103 . . . and some popping when slowing down in gear . . . and, perhaps, a little slow on the low speed acceleration. I suspicion the guy slapped pipes on and that was it . . . no new map.
I am going to put a Heavy Breather on it, or something similar . . . I just thought it would be time to go aftermarket tuner while I am going to a breather with more air rather than just a one time remap . . . thought a tuner I could play a little with will allow me to make whatever changes I want later and to tweak the mapping . . . on an 03 Fatboy, after changing the pipes and breather, paid the cost for the one-time remap, and it still never felt right . . . so, this time, I want some meaningful software control for myself.
So . . . maybe . . . for my limited novice purposes . . . a PCV Retro with an Autotune module? Do I really need the autotune module with what I am envisioning?