I've seen some smaller charts comparing features of different units, but wondered if Garmin has produced a more comprehensive chart listing features down the left and units across the top with annotations in the columns regarding implementation. I saw one Doug Vahrenberg did for Humminbird and it was very informative. Wouldn't mind seeing one for Lowrance products too. This would be similar to what Garmin did with their transducer compatibility guide. Great tool.
I'm talking about screen size, resolution, power consumption, # network ports, Panoptix compatibility, transducer ports and type (8 or 12), frequencies supported, types of sharing and how done. I think some companies call such a document a Buyers Guide.