No. Viper has a different, more snub-nosed head shape compared to Cobra. It's shorter (back to front) and doesn't flare out (top to bottom or left to right).
On Viper, the head section of the cage is not designed to fully encompass the head of the penis. This is somewhat different from Cobra, where many chastity fans are happiest when the head of their penis sits fully within the head section of the cage (though by no means is this strictly required for Cobra).
In a Viper cage, the head of the penis is likely to sit partially inside and partially outside of the head section. For some people, this feature may reduce the likelihood of the head retracting fully out of the head section and becoming stuck on the bars of the cage throughout the day.