I own both the ARB (around $850) and the Slime Heavy Duty ($149)
Obviously the ARB is extremely powerful and fast—which it should be for the price. I’d use it if I took my Jeep off-roading/camping/hunting off the beaten path. I also have used it with air tools a couple of times as it outperforms my small pancake style compressor. For daily use it is overkill and the case takes up a good amount of space—especially in a smaller vehicle like my Rubicon.
That said, I like the Slime for keeping in a vehicle for daily use or road trips on pavement—for emergencies or for topping off.
I removed the Slime HD from the case and store it in the OEDRO bin under the rear seat. It does a fine job as I deflated one of my Raptor tires by 10psi just to see how long it would take. Not bad at all and will do the trick if I need to plug a flat or such. Of note, the Slime HD is very quiet.