The TS-808 was originally released with JRC4558D chips, though some of them had RC4558P, the Texas Instrument equivalent that was the primary chip used in the Boss SD-1.
In 1985, the 9-series was brushed aside to make room for the “Master Series”.
If you’re building a true-bypass version, the TS-10 doesn’t have anything new to bring to the table except a 220 ohm resistor in series with the clipping op-amp’s input that doesn’t affect the tone.
While the Power Series continued production until 1996, Ibanez introduced the new “Soundtank” series in 1989 in a round black enclosure.
The Tube Screamer was restored to Ibanez’s lineup as the TS-10.
The circuit was revised slightly and a number of additional parts were added, but mostly related to switching stability and nothing that should affect the tone.