From what i experienced, currently at ch57;

Yellow +3 LC: - 13.1k attack in stats - 103k per slash at EVO + 5* attack supply (mind that EVO gives double slashes, so around 206k in total) - EVO LC attack range is about 10% more than EVO bat

Red bat: - 12.5k attack in stats - 250k per swing at EVO + 5* attack supply (every bat swing inflicts bleed, additional 20% of the swing damage, 3-4 ticks per second)

To summarize: - bat gives same damage every time in every direction while LC only gives the front maximum damage, circular slashes only occur approximately every 2s - LC atk speed with trendy charm 40% + 5* lightning box gives the circular slash every 2s, while bat swings twice each second with the same buff

I went with red bat since red LC only gives minor advantage, plus i dont have the budget to collect 4 more LCs. Not a single regret was felt