I don't think there is much of a difference between small capital and large capital. Of course profit depends on the capital so for a small capital, we will not expect to match profits with those that have lots of capital. Still there is a chance to match them long term depending on how you manage your portfolio and how determined you are.
Totally small and big capital has a huge difference but it depends in a person on how he value the money to create more money or to lose it. Big amount can eventually give you a bigger profits from one point to another with a small scale percentage while having small amount will require you to make a much higher price to say that you earn profit. The loss would be also equal to the higher so big losses in small movements and for small was small amounts of losses.
we have to know about profit percentages.small or big capital has same revenue in same percentages ,altough in nominal dollar big capital shows bigger.