The only difference I know of between the two types of antifreeze is the green is mostly ethylene glycol and is poisonous. Dogs love it and will die if they drink too much. The red antifreeze is made of mostly propylene glycol and is non-toxic. They are different colors so you don't inadvertently mix them.
Both have corrosion inhibitors so they should both be safe for your engine. The green is not safe to spill unless you wash it away with a hose so that no animal can drink it.
In either case, make sure you use distilled or deionized water to compound the coolant mixture.