Which should I buy the SATAjet X 5500 or the SATAjet 1500 B SoLV mp4

Set or Single Item Single Item. Using only one spray gun. Improved control during the coating process. SATA X5500 Limited Edition Hippie HVLP Gun, 1.4 O, with RPS Cups FACTORY SEALED. Whispering nozzleTM due to optimized air flow geometry.