Less fatigue with the EC sanders is primarily in vertical use, where it's lower center of gravity and weight are an asset. But 30 minutes with them will leave my hand tingling.
The non-ETS doesn't have the same level of dust extraction, but it's still quite good. Less power as well, but in a 5mm stroke, I think you'll be okay. Finally, you've mentioned price a few times and it wins in that department too.
The EC version may be newer, but remember, Festool didn't kill off the old one because they are slightly different and at different price points. Give it a whirl, worst case, you bring it back in 30 days and get the EC.
The non-ETS doesn't have the same level of dust extraction, but it's still quite good. Less power as well, but in a 5mm stroke, I think you'll be okay. Finally, you've mentioned price a few times and it wins in that department too.
The EC version may be newer, but remember, Festool didn't kill off the old one because they are slightly different and at different price points. Give it a whirl, worst case, you bring it back in 30 days and get the EC.