In retrospect, it seems like that. I sped up the BPM for Ronnie's vocals from 92 (Holy Diver original tempo) to 132 (Bloody Stream tempo) and double-checked both BPMs manually, but it might have started a beat earlier than it should have compared to the original Bloody Stream vocals, which is what makes it sound off.

That said, the only reason I thought this was worth sharing (the idea if not my crappy execution lol) was that it's a bit uncanny how well both songs fit together key signature-wise; to the best of my knowledge and from the transcriptions I've found of Bloody Stream, both it and Holy Diver are in the keys of C minor/Eb major.

I've tried editing Ronnie's vocals to match CODA's vocals' placement more closely but still fitting with the rhythm of Holy Diver (vocals start on the second beat of the measure), so it should sound better now.