The DCR025 is the newest radio and supposedly it sounds really good. If it were any other DeWALT radio vs tough system I could see the tough system winning. It has a nice sound. I don't know if the improvements of the DCR025 from the previous model are enough to have a better sound than tough system.
Tough System
Advantages- known to sound good and it is compatible with other tough system.
Disadvantages- no plugins for running your tools, media controls don't control playback on your phone, flexvolt batteries don't fit, no bottle opener, easy to lose power cord
DCR025
Advantages- fits all 20v and 60v batteries, has 2 plugins to run your tools, includes a bottle opener, can use media controls on radio to control music on your device.
Disadvantages- not compatible with tough system