Strictly performance-wise, the AR630-TSS does have slightly better output than our K1322TS. The AR630 comes in at 2.32GPM and 975psi while the K1322TS output 1.97GPM and 1010psi. So you’re looking at just about a 0.35GPM increase. Whether or not that really makes a huge difference when paired with the loss of 35psi is still up for debate. Both units are pretty quiet, but the Kranzle has the edge there coming in a couple dB less than the AR.
But when it comes to quality, product support, reliability, and ease of maintenance, the Kranzle shines above all others. We’re talking about a German built piece of engineering vs. something made in Italy. Just like the Italian sports cars of old, the build quality of the AR is suspect. Its not bad by any means, but it's a bit more “janky” as Matt likes to say.
If you ever have any issues with the Kranzle, or need to replace any parts down the road, Kranzle USA has a proven track record of supporting their systems for years and years. AR may be great as well, but we just don’t know yet. If it were me, I would stick with a Kranzle K1322TS, as would Matt.
BUT, the AR630 is a good machine and maybe you still want to go that route instead if max GPM is what you're most worried about.