I don't think it is the same type of ring. On yours, it is clearly a weird ring in the non-data part of the disc.
On the bootleg II (total size of data = 619716720), it is inside the data part of the disc (or this is how I see them): data part, then tiny gap, then tiny data part, then tiny gap, then the end of the data. And after, there is the non-data part before the Sega ring.
Better explanation on the picture attached.
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