For standard GIK acoustics plates; performance is close; but on GIK you can add built in scatter plate (built in; for diffusing high fequencies in addition to absorbing them... giving a more natural end result.
In addition GIK got a large selection of products for bass-traps in addition to other types of products. From what I`ve seen; these selections can not be found in RW acoustics products.
HT: Trinnov Altitude32 (AL32-1632)/Amplitude8/8M - BRYSTON 4B SST2 - B&W 803D2, 2*DB1, HTM2D2, 804D2, SCMS, Nautilus SCM1, 805D2 - NORDOST Heimdall2/Frey2 - ISOTEK EVO3 Titan,Sigmas - LG OLED65B7V - GIK ACOUSTICS
HP: 2*MOON 430HA D, 2*MiND2 Network Player - 2*Yggdrasil - 2*Hydra Z/ZPM - ISOTEK EVO3 Sigmas, Aquarius - NORDOST Heimdall 2 - AUDEZE LCD-4 rev2, 2*LCD-XC - SHURE SE846