Fat bikes are indeed generally heavier than non-fat bikes. This can make them harder to pedal, especially uphill. The extra rotating mass and increased rolling resistance also makes them harder to get up to speed and limits their acceleration.

Big brands are still rolling Somewhat surprisingly, most of the major bike brands and even many mid-size brands still have at least one fat bike in their line, which shows there is still plenty of interest in the category.

The Voodoo's has a longer wheelbase as it's longer in the top tube and accommodates larger, 29in wheels. Its chainstays are only 10mm longer than the Carrera's, however, as the seat tube is curved to enable the bigger wheel to sit closer to the bottom bracket. In other respects the frames are similar.