toydx

I have autolite app3923 spark plugs and I needed to know if I could put them on my 96 toy Corolla dx? They call for app3924 plugs but I really don't understand the difference. My car calls for one range higher heat than the plugs I have. They are the same thread and most other specs I just wander. Can anyone fill me in on any complications? I have read and informed myself but still don't get it. And don't have the cash to waste if possible... I'm dealing wit about $600 more worth of issues. DONT GET ME WRONG SHE'S A GREAT CAR!¡ Any help would be greatly appreciate! PLATINUM PLUGS!!!