Besides the whole speed thing on one specific site (Bitrefill), i am more interested in knowing which network will provide the strongest security on their transactions and
which transactions have the most chance on succeeding (reaching receiver).
LN :
* Double spending of transactions bugs & vulnerable to bad actors within its system ->
https://news.bitcoin.com/hidden-lightning-network-bug-allowed-spending-of-fake-bitcoins/* Routing problem causing a large part of its transactions to fail -->
https://news.bitcoin.com/researchers-scathing-lightning-network-analysis-finds-flaws/At this point LN is pretty much still alpha software, that should not be used without knowing all the risks that are associated with using alpha software
'Alpha software is computer software that is still in the early testing phase. ... The "alpha phase" of software development follows the early programming and design stages,
but precedes the ''beta phase" in which the software closely resembles the final version'
LTC :
* Litecoin's transactions rely on proof of work for its security (just like Bitcoin) and it needs a certain number of transaction confirmations, before those transactions gets settled
on the blockchain and are considered immutable and protected against double spending. Litecoin's blocks are created faster then Bitcoin and it transactions are therefore also
confirmed faster then Bitcoin, but it is in no way instantly settled and usable by the receiver.
* Litecoin does not have any routing problems like LN has, which means that its transactions will be successful (reaching receiver) when using the correct transaction fee. Settlement will just
take a certain number of blocks / a certain time.
* Litecoin does have a vulnerability to 51% attacks, inherited from Bitcoin. Most proof of work cryptocurrencies have this vulnerability.
Dash :
* Dash rely on both proof of work and proof of service for sending and settling its transactions on its blockchain. Thanks to Dash masternode network it can settle its transactions within a few
seconds without the need for waiting a number of a blocks. Its transactions are immediately locked against double spending and after those few seconds also fully spendable by the receiver.
Currently some 90% of Dash transactions are settled this way, both fully traceable transactions and private transactions.
* Dash does not have any routing problems like LN has, which means that its transactions will be both instant & successful (reaching receiver), when using the correct transaction fee (which is
lower then Litecoin and i suspect it is even lower then LN heavily subsidized fees).
* Dash does not have a vulnerability to 51% attacks, unlike Bitcoin and Litecoin. ChainLocks protects Dash against 51% attacks.