The CDG is miles ahead of the Defiance actions in terms of features and ingenuity. The only figment issue is with the trigger hanger and stock/chassis needing to be inletted. It’s a bit of a PITA but it’s a one time issue. Personally I haven’t seen the need for the trigger hanger but many claim it to be a modern necessity.
Defiance makes a fine REM 700 clone action but not enough to justify the price. If light bolt lift is important, to the point you are willing to deal with a 90* bolt throw then rock on.
If I was looking for a 700 clone, the Mack bros is a better action at a better price