chess.com's local eval uses stockfish 11, while lichess uses 14.1 NNUE. alphazero btfo'd stockfish because it utilized a neural network, and if im not mistaken nnue stockfish is stronger than alphazero
Lichess engine vs Chess.com engine
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One thing I don't understand when going over games in analysis mode on Chess.com is that to the upper right you have one number, almost always much higher +/- than below for the invidual lines. Like this: 
I don't know how to trust the numbers anymore. Would appreciate input.
Best to leave that alone...
Jul 10, 2023
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#6
hijoe16 wrote:
One thing I don't understand when going over games in analysis mode on Chess.com is that to the upper right you have one number, almost always much higher +/- than below for the invidual lines. Like this:
I don't know how to trust the numbers anymore. Would appreciate input.
That happens to me too. I'm pretty sure it's in the analysis settings. I usually set it to Stockfish 14.1 NNUE, and find the best move instead of using gane review suggestions.
Is it just me or is the Chess.com engine more erratic in it's evaluation than Lichess'? For games on Chess.com I'm finding myself importing those into Lichess because I trust the engine there more.
There is often a huge valuation gap between the two engines. Chess.com often evaluating big mistakes as rather small.