Right, there are tradeoffs:

- monero unnecessarily exposes the full amount received to the sender. This is none of the sender's business and is harmful to receiver privacy. Monero also exposes the fee in plaintext on the blockchain, which is bad because analysts use the fee data for wallet fingerprinting.

- lightning unnecessarily exposes part of the amount to each routing node on the path. This info is in encrypted packets and does not get published, and the routing nodes can't know if it is the full amount or a shard. The fee is also encrypted and no one but the sender knows the full fee paid, though each routing node knows the portion of the fee they received. The sender also doesn't know how much the recipient receives, which is good, he shouldn't know that.

So which has better amount privacy, LN or XMR? I'm not sure, but certainly neither is perfect. I think lightning protects receiver privacy better in regard to the amount, but monero protects it from third parties better, unless the sender colludes with them.