Slytherin: Slytherin's are more focused on offense and aggressive nature. It embodies the ambition of strength and power. 

Increased damage from Goblins
Decreased damage from Dark Wizards (excluding Bosses)
Trolls have more health
Gear values altered
Level up fast but slows down the higher you go
Health altered to be less for Slytherin given that they are more offensive in nature
Increased price for herbology items
Increased time for plants
Increased price for potions
Decreased price for potions ingrediants (to encourage brewing potions rather than buying them)
Decreased price for anyting involving potion making including pots (For easier brewing methods)
incresed duration of potions