Personal preference.

Sometimes you would like one or the other, but honestly I shoot a slick gun, have for years and will continue to. A foreword grip of any kind does not offer more in convenience or operability than it does in the PITA Dept. Ask me how one feels when stabbed into ur side or leg during urban movement, or when it gets wrapped in your sling trying to get out of the damn 1151. Or gets caught on ur leg on a fastrope and you catch the buttstock in the chin. I have dozens of examples why slick is just the way I like it.

Learn to drive the gun with or without and you won't care either way. It's not the shooting that will make up ur mind. It's all the other things you have to do between the shots that will determine whether you want one or the other. Like I said. Personal preference.