You mean ones that are on RG Prestige these days? I use to own them for two years and they were OK, but nothing spectacular. Bridge was too bassy for my taste and neck was way too strong. I replaced them with crunch lab/liquifire.
F series shouldn't be that bassy, but I haven't actually tried them.
I never tried them even though I own a set but here is their description from the horses mouth.
The DiMarzio®/IBZ pickups in the Ibanez RG2120 and RG2570EX are specifically designed and manufactured by DiMarzio® for Ibanez, and they are not available separately. Like all DiMarzio® pickups, they are made in our New York factory. Both neck and bridge pickups are high-output models. The neck pickup is fairly bright-sounding, similar to a Super 2™ (DP104). The bridge pickup is a little louder and warmer-sounding, and resembles a cross between the Steve Morse Bridge Model™ (DP200) and the Super Distortion® (DP100). The R1 single-coil is warmer-sounding than a typical vintage single-coil, and was designed to work well with the neck and bridge humbuckers when they are in split mode. It has a sound similar to that of the HS-2™ in split-coil mode.