Barrel Blaster - Its secondary ability can protect anyone driving it from surrounding enemies, especially damaging them heavily after making a donut around larger ones.
Burn-Cycle - Its SuperCharged Mods make it look more awesome than with just one wheel, and its secondary attack can boost its racing speed and turn Gearbits gold momentarily
Crypt Crusher - Fiesta's amigos aid anyone besides just Fiesta.
Gold Rusher - Rapid-fire first attack and useful secondary ability to trick racing opponents into driving into explosive mines.
Hot Streak - Its secondary attack can boost its racing speed and turn Gearbits gold momentarily
Shark Tank - Can burrow underground like its signature driver
Shield Striker - Can magnetically attract Gearbits
Thump Truck - Has the strongest attack that does more than 1000% damage to enemies and bosses.
Tomb Buggy - Its bony appearance looks really cool, especially when SuperCharged by Bone Bash Roller Brawl.
So, if I had to choose either one of them, I select the Tomb Buggy.
Since Hot Streak is more popular than the other Land Vehicles, I can see why they have 4 different versions; Original, Event Edition, Dark, and Golden.
Tough one, but I have to go with the Barrel Blaster. I just love how it looks and plays. Hot Streak comes close, but I'm not a big fan of its flamethrower when compared to the Barrel Blaster's homing barrels.