Minato made more VARIATIONS of FTG. He didn't really perfect it. He marked a bunch of kunai. That's really the only difference betweentheir FTG. Tobirama's reaction speed is better. Proof to that is when juubito teleported his biju dama with minato and Tobirama teleported it back to juubito before Minato could. Tobirama is more intelligent based on how 1. He teleported the biju dama and (unlike Minato) thought to use a clone to do so. 2. He marked juubito when Minato couldn't. 3. He thought to use FTG to teleport juubito into naruto and sasuke's combined jutsu. And 4. He is the one who realized Minato wasn't healing as an edo and figured out a fatal strike would kill them coming from juubito.
Tobirama
Edo Tensei
FTG
Monster Charkra
Swordplay
Sensory
Suiton mastery
Minato
FTG
Rasengan
Kyuubi yin chakra
Sealing jutsu
Things we don't know
If Tobirama knows sealing jutsu
If Minato had mastery over any certain charkra nature
Things we do know
Tobirama can use multiple Edo tensei based jutsu
Tobirama had mastery over the suiton chakra nature
Minato knows multiple sealing juts us.
Ultimately, I think Tobirama solos Minato.
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