Most tabbies (including Bengals) have an M on their forehead although in the Bengal they're trying to breed away from the M and get straight lines going up the forehead like on the Asian Leopard Cat. Also most tabbies have a mascara line and a chin strap and some of the stripes breaking up into spots is not uncommon and spots on the belly are common in domestic short hair (aka moggie) tabby cats.
She looks like a patched tabby (i.e a tortie where rather than black mixed with red she's got brown tabby mixed with red tabby) and that's not a colour you'll find in bengals.
Also for examples on the belly bengals have a very clear colour with strong contrasty spots. They can go from having a white belly with the black spots (which is very desired) to being like Nikita is, she has a very rich red colour in her coat so her belly rather than being white is mango coloured:
A few of my photos so you can see some snapshots of a pet bengal rather than the show/breeding ones that tend to show up if you google for them.http://svg.crowblanket.com/nikita/2008/jan/tough.jpghttp://svg.crowblanket.com/nikita/2008/jan/snooze.jpghttp://svg.crowblanket.com/nikita/2008/jan/spots.jpghttp://svg.crowblanket.com/nikita/2008/jan/throne.jpghttp://svg.crowblanket.com/nikita/2008/jan/spotted.jpg
A lot of bengals are paler than Nikita is (she's actually borderline too dark now to show as far as I understand) but then they have a paler more yellow golden tone to the coat that's very clear. There is a wide variety in the exact colour of these cats (and it changes in photos with the light as well). Also they are very muscular. They feel very solid, surprisingly heavy and filled with muscle when you pick them up, even the females. The coat is also very shiny, close lying and silky. The tip of the tail is always black in the brown coloured ones.
Snickers is gorgeous and unique and looks like a very happy and healthy cat
I would love to see more photos of her. She looks adorable.