It looks like only the Belcarra V1.0 Tri matches the gebioMized Stride saddle. The others seem to have a different shape and larger cutout. Also, for tri I’d prefer round titanium rails over carbon, and I don’t see one from Syncros that doesn’t have carbon rails.
that one has a shorter cutout (and i think shorter nose overall) than the stride. looks like very similar shape otherwise but likely different padding
i see now that the cutout is actually the same, its just the rail mount on the syncros makes the front of the cutout look filled in.
they do supposedly have different padding though - syncros is PU foam whereas gebiomized use “High-end EVA foam”. what that means in practice, who knows