Initial testing Yamaha ATS-1070 vs Yamaha YAS-108 has been impressive: the ATS-1070 sounds very good at all volume levels and gets louder than I need, the ARC control is convenient, and BT streaming works great. The remote looks simple and dated but is perfectly functional. For the price, I doubt you'll find anything that sounds as good, and most competing units at $100 or less don't include ARC.
What’s concerning this side of Yamaha YAS-108 vs ATS-1070 rivalry? The Yamaha YAS-108 Soundbar provides one type of wireless connection for sound sources and three types of wired. By air, work is carried out using Bluetooth technology version 5.0 EDR with an A2DP profile and SBC codec. The range is declared standard - 10 m in direct line of sight. In practice, approximately this is the case in the absence of obstacles. Connectors for wired connections are concentrated on the back of the device. Beside them, white paint is marked accordingly. There are 2.0 built-in channels. In total, there are two digital inputs - HDMI and optical, there is also an analog input on a 3.5 mm mini-jack, outputs - HDMI and an analog output to a subwoofer. Support for all major signal formats and HDMI functions - present, including HDR10 and HLG, as well as ARC and CEC control protocols.
The Yamaha YAS-108 is better soundbar in this comparison. Check Yamaha YAS-108 price