I tried both code but I didn't notice any change with the history or with the balance. I put in range(300).
Why to use different boolean operators in this code ?
"False" makes it generate "receive" addresses... "True" makes it generate "change" addresses... if you look at the "Addresses" tab (may need to use "view -> show addresses" to see the tab), you will see all the "extra" addresses that you have generated... they will likely be highlighted in red to indicate they are out past the "gap limit".
denomination: ok, I had changed it in BTC when i recovered the wallet.
That *might* explain the differences if the first wallet was showing mBTC while Electrum was showing BTC and you've just missed a 0 and the balances are actually 0.38 mBTC and 0.0004 BTC
As for the differences, it seems like that is just down to sync issues with BRD... the values on the blockexplorers are almost certainly the "true" values that the addresses contain. I would trust them over a potentially unsynced wallet.