heres my take on this, I use a lot of brake clean
Chlorinated works better at cleaning hands down.......
non chlorinated doesn't seem to mess you up as bad, my skin seems to be able to take more of it without getting dried out.
also, getting Chlorinated brake clean in your arm pits or eye balls is quite the experience! If even the slightest amount gets in your eye, you will immediately stop whatever you are doing and haul [censored] for the sink at warp speed 9! Nice little sting to it...... Non chlorinated doesn't seem to bother me, I got some in my eye on a couple occasions just today.....
but given this, I'd rather make better use of my money, not be an idiot and spray myself in the eye, and use the better cleaning, chlorinated stuff... because in the end we buy it to clean..... if you wanted to be healthier or environmentally friendly, you wouldn't be buying it in the first place.
my next best suggestion is Simple Green, it works ok, and is also AWESOME for corroded battery terminals, spray some on, wash off with hot water.... Its more friendly stuff, and supposedly you can even drink it!
a better cleaner, but more dangerous to the user, is SuperClean, or Purple Power... I've seen it in various names, its a purple degreaser basically....