Oppo cannot write firmwares that break US law as their firmware programmers are/were located in California. Momitsu is chilling their heels in China and have this advantage of being beyond the law.
Having said that, I would not pass up an Oppo player for this reason as they have great support and firmwares for their hardware devices. I also have a Momitsu and it is nice too! Either company is first rate IMHO and you will not go wrong with either one.
Both companies will put out timely firmware updates if their are ever any issues with their products.
I am glad to see both companies doing so well.