staining new decking on covered front porch

Hello!  We have had our decking replaced on our covered front porch, as well as the steps.  The contractor used fir on the porch and pine on the steps.  It has been a year and I've done the water test, it seems ready to stain.

I worry if I use semi transparent, the fir and pine may not match so leaning toward semi solid.  Also unsure whether to use oil or water based.  I have years of experience painting, but this is the first time to stain new wood.

I appreciate your advice!  Thank you, Shelia