Record Cleaning Machine - Loricraft PRC-3 vs. 4?

The Loricraft record cleaning machines look very promising, using a small point vacuum as opposed to a vacuum slot.

The PRC-4 has a stronger vacuum pump compared to the PRC-3, but is it really a significantly better choice in practice? (the difference in price, amortized over years of use and 1000's of cleanings, is less of a concern).

Thanks, Doug. I'm already putting in the time so I may as well get much better results and, most importantly, save my hearing. That Hoover motor probably runs 100 dB. :-)
Great news, Dan! Join the club. I assume you will be using the AIVS fluid system. How many steps? I added the No. 15 as a pre soak to the standard 3-step plus an extra final pure water rinse. Great results. Enjoy listening to more of the music from now on.
At 40 mins. per, forget getting together for listening, we should have a cleaning marathon. :-)