Both companies operate in the AI infrastructure space, but one is a superior investment.The artificial intelligence (AI) sector has dramatically boosted business for Nebius Group (NBIS 3.90%) and Astera Labs (ALAB 13.47%). The former is a tech infrastructure specialist operating data centers to house AI. The latter sells components to build data centers.Both companies have enjoyed share price appreciation. Over the past 12 months through the week ending Nov. 28, Nebius stock has skyrocketed over 300%. Aster ...