Sometime ghetto reamping can work well enough, sometime works bad.
I`m prefer reamping without any attenuation (using modded ProRMP) to get same level as guitar straight to amp.
My interface have 0 dbFS=+20 dbu (peak).
Reamping without reamp box usually can lead to higher noise, difference in tone can be subtle, in my case difference can be due to lower output without reamper.
Caparison TAT SSH Red Sunset (Charvel Model 6, Charvel Fusion Plus)->Chris Custom Screamer->ENGL TubeToner e430->Randall RG75
Recording chain: Guitar->Digilab SPM-100->ESI Juli@
Reamping chain: Juli@->Radial ProRMP->Screamer->TubeToner->Randall->Shure SM58->Digilab->Juli@