Land-Shark,
Not sure what specs you need but I can get more when I'm home later but here is what I know...
I purchased the whole package Helix 5 Ice machine and bought a separate open water transducer for summer use.
So if you look up the specs of the Helix 5 ice machine that'll give you exactly what I have. I have always had the ice fishing transducer so I cant comment on using open water transducer for ice.
But I can give you some comparison to the ICE 35 if that is helpful because that is what I had before.
I love the ice 35, always reliable readings, but sometimes hard to differentiate marks... i.e. it would always show the fish there, but i wouldn't be able to tell the difference between a small perch and a pike unless it was a big pike... most cases anyways, still loved the unit.
The reason I love the Helix setup is the graph mode that it lets you have. Having a graph in front of you is best as you can see history, like if you're fishing trout or something fast, if you look away from your flasher screen and miss a fish that ran through you're clueless, the graph allows you to see it if you blink lol. And the Helix dials up to pretty near real time like the flasher, theres still a tiny delay between the action and what shows up on the screen, but it's darn close.
I have never had maps rigged up on my unit, the lodge I guided at in the summer had no data anyways so we just followed routes on a white background lol
I do use the GPS down here tho, ill hit mark on a spot that we've seen good traffic through if I want to be on that spot again later on.