Here is what I can share so far.
...significant upgrades versus the Quikmount 4:
1. bonded silicone rubber on bottom roller (instead of sponge silicone sleeve)
2. all new heavy duty stand.
3. steel cores in top roller, instead of aluminum, are much heavier and provide more pressure.
4. beefed up cores in bottom roller
5. spring loaded top roller (instead of O-rings) makes it easier to set top roller.
6. slit in back deck cover for cutting off laminate without cutting the deck.
7. unbreakable plastic tube on take up shaft instead of corrugated tube.
8. switch located on top making it easy to turn motor on/off from front or back.