OGA is an open-source audio file format developed by the Xiph.Org Foundation. It uses the Ogg Vorbis codec for lossy audio compression, offering good sound quality at low bit rates. OGA files are often used for streaming and internet radio due to their efficient compression and high-quality sound.
MP3 is an audio format that can compress and encode an audio file. It uses the lossy compression algorithm to contain audio data. The lossy compression helps to reduce the data significantly without losing audio quality. MP3s are created using different bit rates maintaining the original quality.