Shure MV88 vs Zoom iQ6

[PresetNoob]

I'm searching for a field recorder and would appreciate any help. I would prefer a mic with a lightning connector to record directly to iOS devices. I want to use it for recording ambient sounds in nature, one shots like hitting a rock, glass breaking, cars passing by.. that type of stuff. 44.1khz is all i really need for the sample rate. I would also like to keep it around $100-$150 USD (which is why i didn't include the Rode i-XY's specs below. The lightning version of rode i-xy is $200)

So a few questions...

1) Will the XY design of the iQ6 be better than the MV88's single capsule design for stereo width? Apparently the MV88 has 60, 75, 90, 105, 120, 135 optional degrees when using it with the ShurePlus MOTIV app.. but i'm still not sure which design is better for stereo width.

2) Is Bit depth important in field recordings? Because the iQ6 is limited to 16 bit..

3) Any first hand experiences with these mics?

I found this article on the mics, but it didn't sound like they had any first hand experience... they only reviewed the specs..
http://www.micreviews.com/guides/top-10 ... icrophones

Zoom iQ6 $99


Zoom iQ6 Specs:
Microphone:
Unidirectional X/Y stereo (90°/120°) condenser
Output Connector:
Stereo mini ⅛" jack (combined headphone/line level output)
Audio Quality:
44.1kHz/16-bit , 48kHz/16-bit
Input Gain:
+11 to +51dB
Maximum input sound pressure:
130dB SPL
Connector:
Lightning Connector
Power:
Powered by the connected iOS device
Compatible Devices:
iPhone (5, 5s, 5c, 6, and 6 Plus), iPod touch (5th generation), iPad (4th generation), iPad Air, iPad mini, iPad mini with Retina display
Supported iOS:
iOS 6.0 or newer
Dimensions:
61.1 (w) x 30.6 (d) x 53.1 (h) mm
Weight:
30.5g

Shure MV88 $150


Shure MV88 Specs:
MFi Certified
Yes

DSP Modes (Presets)
Speech / Singing / Acoustic / Loud / Flat

Transducer Type
Cardioid (1 cm) / Bidirectional Condenser Cartridge (1 cm)

Polar Pattern
Adjustable Width Stereo / Mono Bidirectional / Mono Cardioid / Mid-Side

Bit Depth / Sample Rate
Up to 24 Bit / 48 kHz

Frequency Response
20 Hz to 20,000 Hz

Adjustable Gain Range
0 to +36 dB

Sensitivity
-37 dBFS / Pa at 1 kHz

Maximum SPL
120 dB SPL

Headphone Output
Available Through Apple Device

Power Requirements
Powered Through Lightning Connector

Housing
All-Metal Construction

Net Weight
40.5 g (1.43 oz)

Dimensions (H × W × D)
67 mm × 25 mm × 35 mm

Zoom iQ7 $99


Zoom iQ7 Specs:
Microphone:
Mid-side (M-S) stereo mic (90°/120°/M-S)
Output Connector:
Stereo mini ⅛" jack (combined headphone/line level output)
Audio Quality:
44.1kHz/16-bit , 48kHz/16-bit
Input Gain:
+3 to +43dB
Maximum input sound pressure:
120dB SPL
Connector:
Lightning connector
Power:
Powered by the connected iOS device
Compatible Devices:
iPhone (5, 5s, 5c, 6, and 6+),
iPod touch (5th generation),
iPad (4th generation), iPad Air, iPad mini,
iPad mini with Retina display
Supported iOS:
iOS 6.0 or newer
Included Accessories:
Operation manual
Foam windscreen
Optional Accessories:
Hairy windscreen (WSU-1)
Dimensions:
54.5 (w) x 57.2 (d) x 26.5 (h) mm
Weight:
30.5g