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: CLASSE CA-5300 DELTA - BRYSTON 4B SST2 - Marantz AV8802A - B&W 803D2, 2*DB1, HTM2D2, 804D2, SCMS, Nautilus SCM1, 805D2, SA Talent - NORDOST Heimdall 2 (signal), Frey2/Heimdall2 (power), Frey2 (speaker) - ISOTEK EVO3 Titan,Sigmas - Samsung UE78JS9505 - GIK ACOUSTICS - AUDYSSEY Pro Kit
HP: 2*MOON Neo 430HA D - Schiit Yggdrasil - Audiobyte Hydra Z, Hydra ZPM - ISOTEK EVO3 Sigmas, Aquarius - NORDOST Heimdall 2 - AUDEZE LCD-4 rev2, LCD-3F, 2*LCD-XC - SHURE SE846