INON UWL-95S M67 Wide Conversion Lens vs Nauticam WWL-C

Has anyone used INON UWL-95S M67 Wide Conversion Lens lens with INON Dome Lens Unit IIIA (141 DEG.)?

Can it be an alternative to the Nauticam WWL-C?

INON UWL-95S M67 Wide Conversion Lens + INON Dome Lens Unit IIIA (141 DEG.) = 594€
Weight: approx. 397 g (14.0 oz) on land and 618 g (21.7 oz) under water (Lens) + Weight [air] approx. 272 g/9.6 oz (Dome) = 669 g on land
Mount: INON M67 Mount
Depth rating: 60 m/196.9 ft
Body material / finishing: Corrosion-resistant aluminum alloy /rigit black almite
Glass / coating: Optical glass / both side anti-reflection coating
Construction / magnification: 3 groups 4 elements /0.63 (afocal system)
Max. view angle: Underwater: 95.1° / Air: 159.0° (actual depends on camera &  housing used); With Dome Lens Approx. 141°

WET WIDE LENS FOR COMPACT CAMERAS (WWL-C) 130 DEG. FOV with compatible 24 lenses = 969€
Weight in Air = 1.05kg
Weight in Water = 0.17kg
Lens Construction = 4 elements
Lens Coatings = Anti-reflective on both sides
Dome Coating = Multi-layer Broad-band Antireflective Coating
Focal Range = Front Element to Infinity
Maximum Field of View (underwater) = 130º for 24mm equivalent lens
Mounting System = Bayonet Mount
Depth Rating = 100m

Probably depends on what camera you are thinking of using it with, the INON lens will likely have less compromises with a smaller sensor.

finding comparison images is a little hard however this post has some of the WWL-1 that you can compare with UWL-H100 with dome, not the same as your query on the UWL-95S but performance is likely to be in the same ball park.  Note that not all pics are at the widest setting, the cod closeup is at 28mm equivalent , however the two pics for the UWL-H100 are zoomed in a bit to 31mm equivalent so the corners will be better than at the maximum setting.  All the pics have EXIF embedded so you can see the shooting specs.  Both the WWL-1 and UWL-H100 are designed for 28mm lenses.

https://www.housingcamera.com/blog/product-reviews/the-ultimate-wet-lens-sample-post

I would like to use it on an Olympus OMD EM5III with 14-42 EZ lens ( 28-84 FF equivalent)

I would expect slightly better corner performance than the images I linked previously which were with an APS-C camera.  Just be aware that both of the lenses are designed to use with 24mm lenses as yours is 28mm equivalent the maximum field of view is reduced, to about 109° instead of 130° and about 120° on the INON lens with the dome. 

The WWL-1B and the now-discontinued UWL-H100 will both give the maximum field with your lens.  Alternatively you could use these lenses with the Panasonic 12-32 f3.5-5.6 lens to get their maximum field.