My take on the two clutches, stock vs Barrett. Two different Road Stars. I found the stock clutch with my 2006 RS
has a tad more friction zone, a bit more forgiving, thus less "grab" when easing out vs the 2003 108ci with the Barrett clutch.
The Barrett is more akin to my ex 1100 V Star shaft drive clutch, a bit more like an on and off switch initially until I got used to it. When the Barrett grabs it grabs. It has a smaller friction zone. I found I had to use the blipping throttle technique to dial in the sweet spot of the friction zone for slow turns.
What clutch would I recommend? All being said, I enjoy the Barrett as it takes more skill to slow turn due to the unforgiving nature of it when the clutch engages. Because of the increase in torque of the 2003, 108ci the Barrett seemed grabby, so if I goofed up in the slightest, the bike would lurch forwards. Different clutch, different torque, seat, and handlebars, thus the bike felt different than my 2006 stock bike.
Once I got used to the Barrett it is a thing of beauty. I feel super confident on my 2006 with the stock clutch, but have to have my game face on the 2003 with the superior Barrett clutch.
When I transitioned to the 2003 108ci with Barrett, it took some getting used to. Not so much for regular riding, that was easy, but tight slow practicing in parking lots turning under 21' and attempting 18' turns.
When passing, shifting and hole shots the Barrett wins. Friction zone forgiveness, the stock clutch requires less skill.
As Doc mentioned, your right hand will become stronger. Your skill using the friction zone will improve. When practicing ride like a Pro type maneuvers, I call my technique "Iron fisting". Once I find the friction zone, the hand locks itself in the sweet spot and needs very little variation to operate within the zone.
Barrett = quality.
I bought an EBC for the 2006 due to financial considerations but never installed it. That bike is getting a new owner next week. Thus I cannot speak for the EBC but if it works, it's all good.