mohbI couldn't say for sure, I've never used the falcon, but they're both 14k gold. The silver is just rhodium plated to match the trim. Rhodium is harder than gold so in theory it might not be as soft, but I doubt it's even noticeable. I believe the silver rhodium trim was introduced sort of recently, and they just decided to offer an EF nib to get people interested. The nib differences are pretty much just aesthetics, I wouldn't worry about it so much
mohbYes, they're very soft in the sense that they have more spring/give to them. When writing normally they almost imitate an asian brush. I actually sold my Falcon with a Soft fine because I couldn't get used to the softness of it and it was a bit on the wet side. It can flex to a minor degree but not something like you'd expect of a Noodler's Flex pen or a Vintage "Flex" pen so it's best not to push it past the easy range.
They're definitely not firm like the nibs you may have used on a Pilot Metropolitan.
A write sample I had with Tsuki-yo and Blue Steel:
KarlBlessingThanks for the nice writing sample. It does look fairly wet.
I was more referring to the difference between the gold and rhodium nibs. Are the actually a different material more than the finish? Why not have a gold SEF? Just curious if anyone knows.