Hi, I have a Mega Modz macro ps4 controller and got pretty well with it by now lol You can either have a modded controller with remappable buttons and you will select the mods you wish or the juggernaut pack at their site at the time of the purchase. Or you can get a macro ps4 controller, you don't have to add any modchip to it or remappable buttons as it comes with a macro chip and 2 macro paddles by default. Basically it is 2 different products, they have different modchips and are operated differently.
A modded controller works with shooters mainly, while a macro one can be used across a variety of genres. I went with a macro controller as I play many games MK11, Destiny, Warzone, TLOU and the macro one gives me more abilities. I can program different series of same button presses - remap, turbo, turbo double and triple press, continuous press and I can program many of Juggernaut mods via macros on my own. They have instructions on how to do that.
If you think about it, mods are also macros that have been programmed for you by the manufacturer. So every time you press a button on a modded controller that is associated with one of the mods, the modchip applies a pre-programmed sequence for you. All you have to do is just read the instructions and enable the mod.