I borrowed Arcademojo's photo to show the difference between what you see on the AFM 1UP vs. what you see in VP (desktop version here but cabinet looks the same except for backglass & DMD moved to proper screens). AFM 1UP on left, VPX on the right. I much prefer the VP graphics.
That being said, $600 is a bargain for a pinball simulator in a cabinet with some force feedback. A DIY VP system is north of $2K, and more like $3k with bells and whistles. Not to mention the time investment.
The 1UP is great for the price and the time savings.