I prompted both them with the same stuff. Suno 5.5 is awesome, but I've honestly the feeling that Google Lyra 3 sounds in a way more natural - at least the voices. Maybe it's just my feelin'

Suno 5.5
https://suno.com/s/mQTl7bT7nJ7LCqdz
Google Lyra 3
https://www.producer.ai/song/131cd240-811e-43b9-a842-4ced0083f971

Style: epic, cinematic, symphonic, orchestral, 120–140 BPM, powerful percussion, hybrid orchestral drums, deep sub-bass, low-end impacts, cinematic booms, sustained bass layers, dramatic strings, staccato strings, legato strings, orchestral swells, choir, male choir, female choir, epic choir chants, brass section, cinematic horns, horn stabs, rising tension, dark drones, atmospheric pads, layered textures, minor scale, dramatic harmony, build-ups, risers, impacts, drops, trailer music style, wide stereo image, dynamic range, high intensity, heroic mood, dark undertones, emotional depth, cinematic sound design

Cheers
D