Do you think a 2E person with a FSIQ of 120 but lots of highs around 145 and processing speed or working memory bringing the numbers down is going to choose a mate who is closer to their strongest numbers or their FSIQ?
My 2E DH is the closest intellectual match for me of anyone I've ever met, and his FSIQ is 40 or 50 points lower than mine. I think that IQ tests just don't work well for some people. And FSIQ is a poor representation of ability in people with a very wide spread in scores (such as those my DH has).