Does it matter which bridge you use to get from ETH to an L2

If I wanted to bridge, lets say some ETH from mainnet to optimism, I've noticed I can choose between the optimism bridge itself, or many others: hop, stargate, across, celer etc...

Do these all work by the same mechanism? From what I understand if I used the optimism bridge, my mainnet ETH would get locked up and then represented on optimism. If I were to use hop for example, it seems to be cheaper, so it has made me wonder if something different is going on here? Are there more risks involved?