To me it feels like night and day. There are area's that were a field at one time and were almost un-mowable with the 331 and mechanical suspension seat. Now it's no problem however I still prefer to use the 2710 with 72" belly mower on those areas. Other areas that were just OK before are now a breeze. I was kind of a skeptic that an air ride could make that big of a difference, now I'm a believer. Expensive option yes, but worth is for me. So I bought a used 331-72 with 380 hrs on it, fixed a bunch of stuff the previous owner let go, and added the air ride seat. So It's like a new 1511 without DEF and Regens for 1/2 the cost.