You may have noticed that really enjoy Victorian games. One of my favorites is Gaslight from Battlefield Press.
Gaslight also comes in two flavors, OGL (d20) and Savage worlds edition.
Both have the same backgrounds, material and allow you play similar games. But each does have rules and material specific for their systems.
OGL and Savage Worlds
If you enjoyed the old Masque of the Red Death game, or just Victorian Gothic games in general then this is a great choice. What is particularly nice about this nice about Gaslight is how much history is included in the book. While that might be your thing, this is quite important for a Victorian game. There is also a great overview of the whole world, not just England. For these alone Gaslight is a worth the price as resources for any other Victorian game. Gaslight does give you more than that. There are new races you can play, such as werewolf and vampire, which are found in many games. But also the more uncommon Beast Men (which I have only seen in one other game) and the unique (as far as I can tell) Wildlings; or unaging wild children.
There are plenty of new options for all sorts characters, of any race or background. Not to mention new magic, groups, and plenty of foes to face.
I compared this game to the old Masque of the Red Death. Well if MotRD is "Dracula" then Gaslight is "Varney the Vampire"; less familiar, but maybe a touch darker.
The OGL edition is a complete game, over 300 pages of everything you will need to run a Gaslight game including a complete section on classes. The Savage Worlds edition requires a copy of the Savage Worlds rules.
They layout is simple and easy to read and the art is authentic Victorian illustrations and maps that give a real authentic flavor.
Battlefield Press provides a lot of freebies and support for this game and that pushes up a bit in my opinion.