As the electric vehicle landscape charges forward, Tesla Inc TSLA and Rivian Automotive Inc RIVN stand as two of the most-watched U.S. players in the industry.But while Tesla has a strong profit engine driving its future, Rivian has been burning cash, relying on partners like Volkswagen AG VLKAF to keep up the pace. Who has the edge in the EV race, and can Rivian's adventurous brand and recent partnerships help it close the gap?Profitability: Tesla's Cash Vs. Rivian's Burn RateTesla has mastered profitabili ...