The internal cylinder pressure @ tdc is greater in the Turbo because the Fuel/Air mixture is being forced into the cylinder under pressure. That's how/why greater HP is produced in a Turbo/SC'd engine and why they need to have a lower compression ratio. The total pressure of the forced mixture at tdc is actualy greater than that of the N/A engine with a higher compression ratio.
: i would say the NA sense the NA is at a higher compression ratio.. but it should be ok as long the rings are ok. and the block is maintained.