What should be the same is all the work experience with which you will claim points about selected NOC.
If you apply in NOC 2172 for example, and you have 1 yr. experience in Canada in 2172, 1 yr. experience out of Canada in 2172, 1 year exp. in Canada in 2173 and 1 year experience out of Canada in 2173.
You can only claim points for 2 years in NOC 2172, don't matter in or out of Canada. And the other couple years in 2173 are complementary information but you cannot claim points for them.