I am not sure how these two sounds are used in Japanese. Which one is more common, in terms of frequency? Under what cases is the other one used?
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From The Sounds of Japanese (Vance 2008), p.85:
In the above, "a syllable-final consonant" means either
Although note that voiced geminates like this appear almost exclusively in loanwords, and even there under certain conditions are commonly devoiced—see e.g. A corpus-based study of geminate devoicing in Japanese (Kawahara and Sano 2013) or their other recent work for discussion.