I've been using an API Tap Water Filter (DI) for years. I'm in NYC and our water has a very low TDS (mine is 37ppm). The water coming out of my filter measures 1ppm (instrument accuracy +/- 2ppm). I've gotten over 200 gallons, with no waste, from my current cartridge and it is only half consumed judging by the color, and I measure it with my TDS meter every so often. It can make about 1 gallon every ten minutes.
The API filter comes with faucet attachment, hoses and everything you need to plug and play. The unit you mention is way more expensive and seems like you need to purchase fittings and hoses.
If you don't need bathtubs full of water per week, the API unit is a good value. If you need large volumes...well I suppose rodi is a better value.
So, if you have low TDS coming out of your faucet, modest volume needs, and want no fuss refilling cartridges, get the API.