Good from Both I like sounds from Korg Piano , drawbar , strings, nylon , T4 sax , voices , trumpet but the new T5 make a big jump on Piano and drawbar and the other sound are even Better so I give the edge to Yamaha on T5 T 4 and Korg Even Draw. Ron
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Genos, PSR S970, Fender Tele Amercian Deluxe Cherry sunburst , Cubase Pro 8 ,Yamaha A3M Acoustric ,Taylor 814, Ibenez Artcore Custom Tascam DP 32 Yamaha DXR 10, QSC K-12, K 12 Sub K 8 Sinn 945
2 Fender Expo line units .