Have you compared those two line stage preamps that the OP is asking about?
@yogiboy No, have you compared those two specific preamps? Very few if any have and sounds like you’ve only heard the base Rhumba, which by your reasoning wouldn’t qualify you to chime in here either since you haven’t compared either of the preamps he’s asking about. Regardless, I posted something I thought the OP would find helpful, which is what we do here and didn’t warrant your response in the least.