JSRF was no JSR, but it was solid. VF5, VT3 were also both super solid.
JSRF was in every way better than JSR.. more precise and much more fluid controls and gameplay, an equally as good, if not better soundtrack, better optics, better stages, better bossfights, better everything. All in all simply a better game than its predecessor. Did you play the hd version of JSR? it's still good, but the controls haven't aged all too well. I would imagine a remastered JSRF to fare much better there.
JSR is the same game it ever was. How many times have you played JSRF? Once? Twice? I've beaten it once, loved it, never went back. How many times have I beaten JSR? One time I beat it three times in one day. I've lost count at this point. JSR is a much better designed, much better sounding, much better playing game than Future. I love Future, but it requires the game skill of a child. JSR is a much more refined game that requires much more from the player in the way of thinking, adjusting to mechanics, planning, trial and error. It has tension, requires skill, and is just generally more fun than Future. I love Future, but it took everything good about JSR and made it more boring.
Also, the people who say "JSR's controls haven't aged well" are usually people who suck at JSR, no offense. It has always had a learning curve. Which is much more than I can say for JSRF, which has no learning curve at all.