Electrum support - aes_decrypt (sha256 (sha256 ($pass), $data)
different salt type implies ("slightly") different algorithm (as far as I know)

The output of electrum2john will be different for different salt types.
I.e. $electrum$1 means that salt-type 1 is being used $electrum$2 means salt type 2

(the example hash is here: https://hashcat.net/wiki/doku.php?id=example_hashes search for 16600)
Open up your wallet file and search for the "seed_version" field, it should be 4. That maps to jtr version 1.