Recently, two attractive high-end convertibles ended up in the Cars.com office back-to-back, allowing Cars.com reviewer Joe Wiesenfelder the opportunity to pit them against each other. The 2010 Lexus IS 250C and 2009 Infiniti G37 are both hard-top convertibles with hefty price tags, but what sets them apart? As Wiesenfelder discovers, the answer could be trunk space and trim-level features.