The phrase "same tune" means that someone is expressing the same idea or opinion as someone else, often in a repetitive or monotonous way. Full definition
Same tune for Yo - kai Watch Busters, with sales rising by +13 % during Week 31 in Japan. (perfectly-nintendo.com)
However, oil prices have been dropping like hot potatoes, almost 30 %, and with that energy stocks are tanking in unison and singing songs with same tune, along with drilling and exploration companies for shale oil or natural gas. (passiveincomemavericks.com)