The Rivelia is De'Longhi's answer to the bean-switching problem: swappable hoppers let you flip between regular and decaf without dumping grounds or cross-contaminating flavors, all in a compact footprint that fits tighter counters. The side-mounted water tank is smaller than bulkier rivals and refills run more frequent, and cold foam requires buying the Eletta's cold brew container separately (it works, but factor the extra cost). Buy it if you drink both caffeinated and decaf espresso daily and counter space is tight. Skip it if you need cold drinks out of the box or want years of durability reports before committing.
The S8 is what you buy when you've tasted enough mediocre home espresso to know the difference matters. It pulls genuinely excellent shots, owners doing side-by-side tests notice the upgrade immediately, but the drip tray fills with water constantly even when you're catching grounds, so you're emptying it every few drinks whether you spilled or not. That quirk won't ruin mornings, but it will make you mutter twice a day. Buy this if cafe-quality shots justify the premium and you can live with frequent tray duty; skip if you want simpler maintenance or aren't sure you'll taste the upgrade.