@21308I am guessing more feminine because though it is Steven's body that will give the gem it's new looks, it is still Rose Quartz's gem that does the fusions.
I am wondering if it won't be the same fusions as his mother but different looks for that character.
Like would Pearl and Steven together make Rainbow Quartz still since the gem is the same gem or make something new? I think this is the debate they have been working on which is why we haven't seen a gem fusion with Steven yet.