I own several Remingtons, many Tikkas, and a sprinkle of Brownings, Winchesters, Kimbers, etc.
I do not currently own any CZ BOLT guns. However, I DO own a couple of CZ RIMFIRES, and I have handled and shot CZ Bolts guns.
I consider the CZs to be of similar quality and fit and finish to the Tikkas. While both guns have their pros and cons, I personally like the Tikkas a bit better than the CZs. Given that I normally buy stainless synthetic rifles, and Tikkas has them, but CZ does not, it's a no brainer and I buy the Tikkas.
As for the Remingtons, as I stated, I think that I (currently) own more Remingtons than any other make, and all of them are tack drivers. However, I personally think that the quality and fit and finish on both the Tikka and CZ are better than that of my Remingtons.
I have been disappointed in recent years with Remington's quality. And one example is that I got a BDL SS DM in 7mm-08 that had a trigger so bad and loose, that it was shifting left-to-right like a belly dancer. Given that I really needed the gun for a hunt out in Texas the next week, rather than sending the gun back to Remington to fix that defect, I just had the gunsmith install a Jewel trigger. As another example, it seems that the newer Remingtons do not have as tight of tolerances between the bolt and the receiver, whereas the Tikkas and CZ have tighter tolerances. Just my experiences. Again, I love all of my Remingtons, but I must say that the Tikkas and CZs have better quality and fit and finish, and they are shooters too.
As I am sure has already been stated, shooting comfort is also very important. Have your son handle both the Remington CDL and the CZ and see which one fits him best. You should definately take that into consideration.
Zachary