Yes big change in midrange power and extended power band to the redline.
Stock version 6 Sti running 1.4bar on VF29
Built motor running 1.49bar on VF34/p18 - Crower 272 cams - 1st dyno run
As tuning progressed (I did all the PFC mapping myself) it went on to make 387nm & 312hp at the hubs with the VF34 @ 1.7bar