Going from G27 pedals to V2's was a huge jump for me. Moving to the HE's was nice as they're so, so solid. It really adds to the immersion and braking consistency is much better now. I also like the pedal travel that simulates brake pad to disc distance.
CSW v1 to DD is totally different, there are forces now that you don't get with other wheels. I would never have guessed it but if I had to showcase the wheel it would be the HPD @ Spa. That car used to be so lifeless and dull, now, you feel everything. I can show you bumps and feeling on tracks that never existed before.
Barmy, you're welcome to try mine out for yourself sometime.
I got PCars working well again, a little tweaking and its about where it was before, not the best for ffb but plenty enjoyable. I rate the sims I have tried so far: iRacing (by a good margin) AC (huge improvement for me since DD) then PCars. I still have Raceroom, Stockcar extreme, rfactor & Dirt Rally to try out. The ffb is that clear in iRacing, and feels unique to each car, from a V8SC, to a GT3 and open wheeler etc. I think I could guess what I was driving if blindfolded, each can feels that unique.