Olrox17
Hero
Yeah, what Undrave said and more.Why?
What can your level 6 rogue do that and the Sorcerer can't?
I know (the stupid fireball mage concept).
Expertise to stealth (and possibly to the amazingly important perception skill), probably an higher dex score, cunning action (bonus action hide, disengage, and if anything goes wrong, dash!). Also more hp, most likely more AC, and almost certainly more initiative.
A bad stealth roll and a bad initiative check is all that's needed to kill a scout. Being a rogue minimizes those risks. Being a sorcerer is almost a coin flip between life and death every time.