Some Portland pros would be better boating scene and lw/ws is close by, less traffic, slightly lower cost of living.
Some Seattle pros would bigger mountains, along with the winter rains there is also a lot of snowmelt runs in the spring/summer, vastly superior skiing if that matters to you, imo a cooler, much prettier city with more going on, way better for career advancement.
Not sure which of those you prefer, but you can't go wrong with either..well unless you need sunlight in the late fall/winter/early spring time of the year.
Interestingly enough it's like a desert up here in the summer. The last two months have been between 75 and 85 and sunny everyday.