Without being rude, please don't do this. If you both have a good score you both are going to get ITAs, and that means that someone with a lower score might not get one. There's actually no benefit of creating two profiles, just create a profile for the one with the higher score.
I get your point. The reason for creating two profiles is that I'm on the threshold of getting ITA, with a score of 430, but I'm in a better position to get the reference letter from the current employer in the recommended format. My husband has a high score, but he might have some trouble getting the reference letter in the required format. So, if the score drops below 430, we'll submit with my profile, otherwise try with my husband's.
If the score doesn't fall below 430, it would imply a wait of probably a month for getting ITA with my profile, since my score would drop to 425 next week. A wait of 1 month is not a big deal in itself, but it means that I won't be able to meet my husband for that long, since we have got all the required PCC's and don't want to travel until submitting the application.
And technically, both of us getting ITAs doesn't mean that someone on the threshold would miss out. The cut-off is decided based on how many more hundreds of profiles would be added with every drop in CRS score, and whether that number is within a reasonable deviation from the pre-decided number of ITAs to be sent. It is a very non-linear function, unlikely to be impacted by one additional profile.
Hope that I've not earned the wrath of ROHopers forever...