Well performance wise, it doesnt matter. Non modular clutches are better in my opinion because you don't have to replace both the clutch and flywheel when one of the 2 goes bad. The only difference between the 2 is that with a modular, the clutch is rivited to the flywheel and with a non-modular, the clutch is bolted to the flywheel.
Matt 1995 Eclipse GS 2.0L, S16g Turbo, 8 Injectors, 26psi
1998 Eclipse GSX 2.3L Stroker, AEM EMS Converted to Speed Density, FP3065 Turbo, 35psi , and so on...