I have gone from using Logitech for years, to CSL LC for a couple years, to HE Sprints. If I were to do it again, I would have skipped the CSL LC and gone right to the Sprints. My friend has some V3 with the performance kit and I think the CSL LCs are just as good as the V3. The clutch is not as good on the CSLs but the throttle is better then the V3 in my opinion. Still, I had a handful of issues with them and it just got to be too much. Too many races where they would flake out. A few different issues too. When they worked, I thought they felt alright and were a big step up from the Logetech. However, when I finally gave up on them and got Sprints, I was blow away by how much better the Sprints where.
The biggest improvement in the experience from the Sprints is the brake is easier for me to modulate and come off the pedal smoothly for trail braking, making trail braking much much easier for me. I was never able to modulate the CLS LC very well. It felt alright squeezing into the pedal, but the releasing was not as smooth which is a big deal for my driving style. The throttle is so much smoother on the Sprints and being able to adjust the throw has helped make it easier for me to roll on the throttle. Maybe it is that I have been focused on improving in those two areas of my driving, but I feel like the Sprints have made it much easier to have precision and work on the small details to try and improve. I was working on the same things with the CSLs, but I struggled to be consistent and I thought the issue was all me. Of course the issue is me and a really fast driver on cheap gear will fly by me just like if he had top of the line gear, however, I feel like at my skill level, the nicer pedals have allowed me to have a bit better control which has helped make it easier to feel the small details I need to work on. Some of this is the adjustment available on the Sprints and being able to adjust the force and throw. Some of it is also the precision and a seemingly better built product that is just solid where it needs to be and super smooth through the range. It might not be perfectly fair comparing a well used set of CLS LCs to brand new Sprints, but damn... big difference for me.
Easy for me to spend your money, but I do think you may end up wanting the Sprints and wishing you had just gotten them sooner then later.