The biggest difference is that the 30IF has a four element induction smooth top.

Here is a link that might be useful: Compare aj madison

like laat2 says, you are compareing an Induction range to a regular Electric range.

I'd go for the induction hands down -

Before the electrician comes in to install the 240 volt 40 amp line, is there any way to tell if the Electrolux free standing induction will fit flat against the back wall without interference of what's left of the gas line?
The gas line is about 2.5-3 inches tall and about 8 inches long without the hose.

I don't know about that, but I would have a plumber cap off the line at the wall.

From looking at the installation guide, the electrical box needs to go pretty much right where that pipe is located. The box is to be located from 0" - 6" off the floor and +/-11" from the centerline. It says that the opening is 2-5/8" deep. You won't know for sure until you see the back of the range.

I'm not sure what the code is for having an electrical box next to a gas line.

I was looking at the specs and I think there is a misprint. They give the amperage rating as 55a for 240v and 48a for 208v. This is the same as for the slide-in range.

But the circuit requirement says 40a which I think is too small. It should be 50a like for the slide-in range. The only way to know is to look at the placard on the range itself. If it were me, I would have the electrician install a 50a circuit. That would be better than installing too small a size and have the breaker tripping off all the time.

BTW: the induction range is very new. I'm sure there are many people who would like to hear a review of it once you get it installed.

I have the slide-in version. Make sure your electrician looks at the installation diagram and puts the box where indicated, because there isn't any other space on the back of the range to accommodate the box. I think that gas line will be right in the way. Also, there is barely enough space behind the range for the power cord...I wouldn't want any unnecessary gas lines back there. I would also have a 50 amp circuit installed.