Actually, no. The replacement for the 717 is the 719, which I also have.
Yes, the 737 is a stereo mic. It's fairly large (think small handheld vocal mic) and uses a AA battery for bias power. You unscrew the base of the mic ans place the battery inside. It has a 90/120 degree switch just like the 907 (which I believe relaced it.
I have two recordings from the same show at the same venue (different locations) one on the 719 and one on the 737/ The 719 seems to have picked up a broader range, but the sound seems clearer (if that makes sense) from the 737. I'm not sure if the difference is in the mics, the location or the recording method (HiMD (PCM 16/44) for the 719 at the "sweet spot" about 12ft from center stage, mic > homemade batt box > MacBook Pro (32/96) for the 737 FOB. Both mics were about 7.5 ft high.
I can try to post samples if that would help.
I'm trying to sort out the best overall combination of the equipment I have so that I can get the best possible recording next time I hit this venue. If I run the laptop again it will probably have to be FOB. The MD will always be right at the sweet spot.