2014 and Older MAC J Plates

Nothing, chain plate wont accept straps though.. thats all

 

Also, the 1" lip is the important thing i beleive, theyre all more or less interchangeable, and tarpstops are most expensive, mytee has reitenour plates for 1/2 the price

 

And yes, flat hook plates have same wll, only difference is hole is big enough for a 4" hook, the notch for looping chain through and attaching to itself is still there

Beats me as to what makes that much of a difference on older macs

If i were me, id load next to a guy with a reitenour and just test fit their plate.
Outside of that, maybe a pic of your current track (and plate if you have one)

 

Looking at the pics you posted I would be concerned about the strength of the sides of the hole in the hook plates in the case where the pull is not straight otherwise both can be used. I would carry mostly hook plates but would have 4 or more chain plates too.

 

You can use chains on either style. I will say l've seen more of the strap style ones bend over time. That's with dedicated steel haulers hauling multiple loads every day though. Doing generic flatbed work they would be fine.