Was interested by this comment and wanted to note a few things. The Titan is significantly smaller (in terms of length ~1/10th the size although obviously displacement is the real measure)[1][2]. And the depth of the implosion is about 4x deeper[1][3]. So there are things that could definitely affect the sound signature.
[1] https://en.m.wikipedia.org/wiki/ARA_San_Juan_(S-42)
[2] https://en.m.wikipedia.org/wiki/2023_Titan_submersible_incid...