What are the differences between base NYSE data and NYSE ARCA data?

I am trying to figure out the difference between NYSE data and NYSE ARCA data, not the exchanges but the data, and I don’t seem to find a good link or description for it.

I have been using NYSE data and never noticed any issues (a friend has the ARCA feed), but we recently found a volume indicator behaving differently with the two feeds. After researching it somewhat I am even more confused, as both supposedly provide the same top-of-book information just at different refresh rates.

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This is what Bart had to say about it (ChatGPT said pure NYSE was better and more expensive than ARCA, as did Bart a few days ago, but the response has changed ever since I started researching it):

The main difference between the standard NYSE and ARCA data feeds is the level of detail they provide. The standard NYSE data feed provides a top-of-book view of the market, while the ARCA data feed provides a full depth-of-book view. This means that the ARCA data feed includes more information about the order book, such as the number of shares at each price level.

In addition, the ARCA data feed provides more information about trades, such as the size of the trade and the identity of the buyer or seller. This information can be useful for traders who are looking to identify large blocks of shares that are being traded.

Finally, the ARCA data feed is available in a wider range of formats than the standard NYSE data feed. This makes it easier for traders to use the data in their trading systems.

Here is a table that summarizes the key differences between the two data feeds:

Feature NYSE ARCA
Level of detail Top-of-book Depth-of-book
Information about trades Size of trade Size of trade, identity of buyer or seller
Formats available ITCH, FIX ITCH, FIX, CSV, XML

Ultimately, the best data feed for you will depend on your specific trading needs. If you need a high-level view of the market, the standard NYSE data feed may be sufficient. However, if you need more detailed information about the order book or trades, the ARCA data feed may be a better choice.