UTXO Coin Comparison
A UTXO is an unspent transaction output. In an accepted transaction in a valid blockchain payment system (such as Bitcoin), only unspent outputs can be used as inputs to a transaction. When a transaction takes place, inputs are deleted and outputs are created as new UTXOs that may then be consumed in future transactions.
In the Bitcoin network, which uses this model, a UTXO is the amount that is transferred to a Bitcoin address (along with information required to unlock the output amount*) during a transaction. (See r3 for more here: https://www.r3.com/blog/2017/07/18/what-is-a-utxo/)
Many other currencies are modelled on the same technical concept but how do they compare with one another. The image below shows some of the comparisons.
This article shows a really good visual representation of how UTXOs work on bitcoin.
https://www.ccn.com/bitcoin-transaction-really-works/