hmm. I have had the same rio return pump on my reef for over 5+ years. I have burned out some of the smaller ones using them on a wave-maker but 2 years of on/off action every thirty seconds burns out maxijets too (and every other pump i stick on that wavemaker strip eventually). way back the old oil filled rio's were a hazard and that kind of left a bad taste in a lot of bobbyests mouths (coming home to a tank with an oils slick and dead animals will do that). but over all I have had good luck with them.
that said I can't compare to the Sicce at all since I have never used one. looking up the product information and warrantee (3 years) I wouldn't hesitate to try one. especially if its as quiet and energy efficient as they advertise.