according to titan themselves, titan contracts cometic to make all of there head gaskets so basically they are the same gasket. as for thickness- 1.4mm would be fine for mild boost or stock bottom end. for heavy mods or a built engine, u can't beat a 2.0mm. according to stillen a 2.0mm would lower compression down to about 7.8:1 on a stock 7m- which means more boost can be safely ran. ive personally used both (i swear by tms head gaskets), just a matter of how much power you are planning to make. but u should definitely get the head checked while its off.
i got this from a different thread supra ED and i think you wrote this
but i also have read that lowering the compression its not good, why? for some reason i dont remember, but thats what they say