in the sydney mod section, The_Hawk has just posted his dyno plet from today with a 1.4TSI.http://www.vwwatercooled.org.au/foru...a-68365-4.html
I would be fairly surprised if the 1.4 is smoother than the 1.8 - the nature of its makeup means that it requires boost to make torque, and that means a lot of technology has to work perfectly to get it to deliver smooth power.
As a comparison, heres a dyno plot (same shop, very similar weather) from my old mk3 turbo diesel -
quite similar numbers and rev-range to the 1.4, but see how my old diesel with greater displacement, only 2 valves per cylinder, sizeable turbocharger and mechanical fuel pump makes a much smoother torque curve because there are fewer feedback loops interacting with eachother (very simplistically). (just FIY, the 2 curves are so different because I increased fuelling after the first run)
Definately the 1.4 has to work harder... not necessarily is that a bad thing though.