Is there an overlap between the 2022 Bonus 49 PAK and the 2023 Bonus 49 PAK? Does it make sense to install both?

No then Yes. My understanding is that the 49-pak is all new material each year. It is an add-on purchase and I'm not aware of any overlap. I'll try to verify this, so give it some time for others to comment here (although most of us on the forum are just fellow users).

Welcome to the Forum.

EDIT: I found this description of this year's 49-pak. Note the word, 'unreleased'.

2023 49-PAK 60 Unreleased RealTracks, Look Ma! More MIDI 10: Acid Jazz, Instrumental Studies Set 19: Modern Country Soloing, MIDI SuperTracks Set 36: Funk & Jazz Piano, MIDI SuperTracks Set 37: Contradance Piano, Artist Performance Set 14: Songs with Vocals Volume 4, and RealDrums Stems Set 3: Jazz, Latin & World!

ps Chantelle from PG Music confirmed the content is different each year. FYI, I used the Live Chat button and received the answer within two minutes.

Thanks for your answer, then I will install both.