I had problems with Falco because I kept getting my reflected Fireballs getting thrown to my face lol.
That said, I do believe Luigi's frame data is better. F3 N-air, F5 U-air, F6 Bair, F7 F-air and F10 D-air. And also F2 jabs, F4 DA, F6(?) tilts, F12 F-smash, F6 U-smash and D-smash, and I don't remember grabs.
I don't think Luigi outranges Falco. Luigi's attacks doesn't seem to stretch his limbs, just like Falco, unlike the Hoo Hah spider monkey we know...
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A2ZOMG
How does Falco walls Luigi? I do believe you can do a running Cyclone and get away with Cyclone's mobility because Falco isn't fast.