One that has been around and recognized for thousands of years and one that has only been around for 14 years and is still limited in popularity. So is that comparison fair for bitcoin? Furthermore, low capitalization does not mean that it is inferior to gold, but also shows the great potential of bitcoin and we should not ignore that. But its low capitalization also means it will have greater risk than gold.
Risk now is smaller than a few years ago for Bitcoin. It has been becoming stronger with time and after each year, through each halving cycle, Bitcoin becomes stronger and get more adoption.
The point is with small market cap, Bitcoin is more vulnerable to manipulations and it has more volatility so that if people do wrong trades, take too high risk with leverages, futures, they will be more easily killed by whales' manipulations and exchange liquidations.
There is no benefit in comparing the two, if you are willing to take risks for high returns then choose bitcoin. If you have become too rich and you need a safe and low-volatility asset, gold is the choice.
It depends on your view. Comparison always has its points and we always need comparisons to keep our thinking as neutral as possible. Without comparisons, we will tend to see a thing is too good or too bad without opposite review.