Fees? Fees for LSP depends firstly about onchain fees, because are just onchain txs opening channels.
If a LSP will charge and extra fee, is because they want to cover some possible loses in force closing or funds "locked" not moved by the user.
Comparing wallets based on the LSPs fees doesn't make too much sense. LSP is LSP, wallet is wallet.
Here is a comparison guide about wallets features.
https://darthcoin.substack.com/p/lightning-wallets-comparison