The Chaser would win.
The 1JZ-GTE in the earlier Chasers/Mark IIs/Crestas were twin-turbo, non VVTi - that's the JZX-80- and JZX-90-series models.
The 1JZ-GTE in the JZX-100 and onwards models was the single-turbo version with VVTi, and they did have more torque than the GT-Rs - at least the R32 and R33 models, not sure about the R34.
The only 2JZ-powered Chasers are non-turbo, as far as I know. Same engine as the JZA-80 non-turbo Supra, the JZZ-30 non-turbo Soarer/Lexus SC300 and the non-turbo JZS-140 and JZS-161 Aristo/Lexus GS300 (including the Aussie-delivered ones).
I can't see myself getting rid of my Stagea any time soon, but if I ever need or can afford a second car, a manual JZX-100 Chaser is at the top of my wish-list!