In the case the seed phrase has been generated by electrum itself, its type is recognized by electrum once you enter it.
It's not possible to generate a legacy wallet from a segwit seed phrase or vice versa.
If the seed phrase has not been generated by electrum and that's BIP39, there would be three script types, not two.
The scripts was what I meant, since OP didn’t specify maybe he generated the seed from electrum but rather was trying to recover his electrum wallet which could have been an old seed not generated by electrum but previously used on electrum before the change of his computer