Hey, I have both a Visi-therm Deluxe 100W and a Stealth 200W in my 46g tank. At first I only had the 100W Deluxe because it used to be in my 20g tank, and I wanted to get another Deluxe to work together with the 100W in the new tank. I couldn't find anymore Visi-therm deluxe at my local Petsmart or Jack's Aquarium, not evne wal-mart. So Iended up just getting the Stealth at Petsmart, saved me $15 by using Petsmart's online pricematch thing. I like the Deluxe better as far as looks go, but if you have a dark background, the Stealth look really nice. I got a dark background for my tank, but it was a little short by maybe a centimeter in the back, I just pressed the Stealth in the corner and because it's long, it covered up the spot that my background missed really well. and you couldn't even tell ther's a heater there. Whenever I wanted to move the heaters, I always had to be really really careful about the Visi-therm Deluxe just cuz it's glass, but I have hit ti against the glass tank before a few times, and it never broke. However, the Stealth seems erally really durable. The other really big difference is taht teh Deluxe has a light indicating when the heater is turned on or off, but Idon't nkow how much that matters to you.