Engine Ice is propylene glycol (PG). Normal antifreeze is ethylene glycol (EG). Ethylene glycol is toxic to animals and plants, and is SLIPPERY if spilled. Propylene glycol coolant mixes tend to have less surface tension than EG mixes and can show improved cooling in some conditions. The lower surface tension allows smaller bubles to form if hot spots develop in the engine when run hard in hot conditions. The smaller bubbles allow improved cooling over larger bubbles.
There are several other propylene glycol antifreezes on the market including Sierra, Amsoil ANT, and Evans NPG Coolant - to name a few.
I use a 20% PG, 5% surfactant (like Water Wetter), 75% distilled water mix. This gives me sub-freezing protection, and improved cooling for the engine. If you live where it gets substantially colder, use a greater percentage of antifreeze.
I hope this helps.