Colt Cobra, Agent, or Detective Special.
The first two are rated for +P, which the S&W airweighT "J"'s are not.
All three of the Colt revolvers you mentioned will handle .38 Special +p ammunition.
However all three were created long before there was any such thing as +P ammunition and Colt didn't actually rate the Agent nor the Cobra for +P.
In the late 1970s when +P first appeared, if you had called Colt Customer Service you would have been told that any and all of their D-frame revolvers, both all steel and aloy frame models, would handle +P ammo in moderate amounts.
Which is exactly the same thing S&W Customer Service would have told you during the same time period regarding all, of their J-Frame revolvers both Steel and Airweight.
By the way, I was a stocking dealer for both Colt & S&W back then so I know this information to be accurate.
Colt and S&W knew that sometime, somewhere, someone would shoot some of the .38-44 High-Speed/Super Police ammunition in them.
Therefore all .38 special Colt and S&W revolvers manufactured after 1940 were designed with that fact in mind.
It was this extra margin of strength that enabled the ammunition manufacturers to develop +P ammo.
The original Remington/Peters .38-44 ammunition was designed to be used in S&W N-frame and Colt New Service Revolvers and will create higher pressures than most modern day .38 Special +P ammunition.