when he is fighting the smaller twin li wins by taking away the twins leg use. before that he was loosing the fight.
so, do you think the twin would have won if say, they were fighting in a clear open space where the twin had his leg advantage?
Possibly.. but any fight like that is as much using the surroundings as it is fighting ability (in a movie context anyway), so if you split the fight into the two parts of ability and intelligence the twin may have been able to win had he been able to kick but he lacked the ability to draw Li into a place where he could use them and consequently lost.
Anyway its impossible to say- in a wide open space he may have won if the fight were one on one, two on one deffinately not but then you can hardly blame him.. he may have been winning in the movie if he wasnt being periodically taken down by the big twin during his fight with the smaller one. Who knows! Too many things to take into account really