Is it possible to convert LC1 to L2A with Qgis?

Hi.

I am a Spanish user. Sorry for my level of English.

The question is simple. I have made an atmospheric correction of an image with the Qgis SCP plugin. But I’m not sure if the result is the same as the Sen2Cor tool. I think it’s not the same thing.

Can only be switched from LC1 to L2A with Sen2Cor?

Best regards.
Tranks.