That gasket is 1.4-1.5 mm thick. Cometics offer 3.5 mm thick gaskets. So %95 chance with the thicker ones? LOL Strange no one but Gloyale has looked into it.
1.05mm thickness for the 642 gaskets.
1.70mm thickness for the 610 gaskets.
I would say that since the 97~99 DOHC heads with a 642 gasket do not work (piston hits the head) and the 610 gasket enables it to work (since its the stock replacement)...that the SOHC heads with the 610 would work.
The combustion chamber CC: I think the SOHC has a little more since the shape is different than the 97~99 DOHC heads.
The pistons on the SOHC phase 2 do not come out of the block.
The pistons on the DOHC phase 1 97~99 do come out of the block.
Both DOHC and SOHC, IIRC, have the similar valve seating positions but at slightly different angles.
I dont think there is a significant enough change in timing/lift/duration to cause a concern.
And most of all, I would *NEVER* use a cometic MLM gasket in place of a SUBARU MLM gasket.
I would use the cometic MLM in place of a composite/non-metal type gasket.