Everything depends on the condition of the unit involved. If the liners are sound and level, use the steel multilayer. If there is any uneveness in the liners, use the uprated standard gasket. That's a very simplistic explanation. There are also upgrades for a stiffened oil rail etc., I would suggest a trawl of the net for the full info. It's not straightforward and you need a specialist to give you the best advice once the engine is stripped for inspection. There is no fixed answer to your questions.
