For identifying your second orchid - its not really possible because there are too many hybrids that look similar to be confident.
So what I do with ‘NOIDs’ is find a well known hybrid that looks similar and label it as a ‘like’.
For example, Odontocidium Sunny Daze is very simiilar and currently popular among commercial growers. So I would label this plant:
Oncidium LIKE Odtcm. Sunny Daze.
That tells me all I need to know. I don’t like having unidentified plants in my collection least I accidentally give a favourite away (when not flowering) or buy too many similar looking plants, but as soon as I see that label I know all I need too.
Because I grow in slotted pots I loose a lot of labels. I sometimes think all my plants are slowly noiding themselves.
I would grow yours under general Oncidium conditions but spare it from hot weather as it appears to have a Cochloidea parent, which are high altitude plants in the main.
Also, people can give you better advice if you put your location in your bio.
Cheers
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