We've gone a bit off-topic here. One of the reasons why I believe the RO 90 leaves scratches where other, better designed sanders such as the other Rotexes don't is due the interaction of a small footprint with overly aggressive eccentricity. As previously mentioned, the better designed, better balanced smaller SXE400 doesn't gouge. Nor do the big Rotexes. The heads are more easily controlled, and their diameters in relation to their weight, balance & ergonomics makes for much easier & less damaging progress.
Just like a big floor polisher, the RO150 in particular can be smoothly & easily "steered" left & right with just a degree or two of positive & negative tilt on the rear handle. The rogue RO 90, by contrast, just wants to behave like a bucking bronco in trying to shed it's operator's grip. The combination of poor balance & abysmal ergonomics makes for an unhappy association, & way too much time wasted in attempting to remedy the damage done by this evil little beast.
Back to the OP's query regarding the orbital palm sanders' performance. There is one sander available that may meet your triumvirate of requirements: faster progress, a small (80 x 133mm, just like the "400") footprint, and fine balance & control. I had forgotten about this little beauty, as it's priced prohibitively beyond my reach despite the quantum leap in technology it appears to represent.
https://www.mirka.com/mirka-deos/
Having super-premium price & performance characteristics appears to be only part of the equation, however. It's also tiny in comparison, super-light (by 20-50%), 50% more aggressive than the rest, and (unlike the rest) purpose-built for net, mesh & paper abrasives. That killer combination of 3mm eccentricity, lightweight & abranet makes it a probable champ.
However, no amount of wishful thinking is ever going to make it in any way affordable. Quality doesn't come cheap unfortunately.
