Thats the difference. Justin has way more than deep pocket than Do Kwon and he can able to generate funds to fight backs those trying to pull him down. Its a long way to go to beat down tron, and I assume they will strive even for a longer term. Just that this system has loophole and they should be very careful. Also reminding the investors to not go all in with the sweet apr they are seeing now.
Being richer and have more money in pocket are not helpful if he does not intend to save USDD and TRON. Do Kwon made a bad decision to choose one and leave another die and what he chose is simply a serious mistake. If he chose $LUNA, he should save it rather than kill both tokens. Terra Foundation Guard used their reserved to save UST and failed. In the end, they lost most of money and can not save anything.
Justin Sun from beginning of the USDD de-peg crisis chose a good way to handle it. Spend money and try to handle the crisis. At least now we can see USDD gradually reclaims its peg. It is supported by general market too. Personally I still feel unsafe with algorithm stable coin, not only USDD. We don't know how bad the market will be and company can not make over collaterization forever. It has limited capital in pocket.