In the future, post a link for someone to follow. You’re less likely to get any help if I have to go search for it myself.
I can’t find the JRTC382CA on the tikka site, which is the easiest way to find the differences.
If you get on the tikka website and find both model numbers in the ‘tikka selector’ all you have to do is click ‘Add to Compare’ and you can compare multiple rifles with their specs side by side.
but like I said, I couldn’t find the one without the X in the model number