I don't know what would be required to make a suitable comparative article in terms of images, as my current lack of the Eduard kit or of a digital camera is probably a serious impediment...
I can provide the following reliable info however:
I have been astonished to see that for over two years now, since the release of Hasegawa's A-5 with the red car, there has been no build review of this kit or of any of the subsequent 1/48th A-6/8 variants that Hasegawa has released... The only thing reviewed and built I have seen in that entire series was the BMW automobile... I have scoured the internet and all the major magazines for two years now and, except for the box sides and instructions, I have yet to even see a photo of one built... I cannot remember, in over ten years of modeling, of such an ostracisation of a major new release. I think this is due to the barely pre-emptive Eduard releases, and also, perhaps, to the later Hasegawa 1/48th A-5/6/8 series being confused, quality/accuracy wise, with Hasegawa's 1/48th A-3/A-4 releases of just a year previously. They are not of the same accuracy and quality at all, and the clear parts of the later 5/6/8 series, in particular, are the first accurate 190 clear parts ever done in any scale... They SHOULD be the same as the clear parts in their A-3/4s, but they most definitely are not!
Peter Kormos measured for me the windscreen of an actual relic, and this came down in 1/48th scale at 5.1mm wide by 10mm long; an exact match to the later A-5/6/8 Hasegawa 1/48th series; the first and only such match in all scales... Even Hasegawa's 1/32 scale windshield is wider, as is their 1/48th A-3/4s, being all about one scale inch wider (as is, perhaps by a touch less, the 1/48th Dragon). 1/48th Tamiya and Eduard are both over a full 2 scale inches wider at 6.2 mm: Well over 50 scale mm! This is a 20% error on a simple rectangle, one that throws off the entire canopy shape...
I think the Eduard simply stole the glutted limelight by being a few weeks early (hundreds of Eduard build reviews vs ZERO for Hasegawa, in the SAME two-year release period...) and being loaded with gimmicky open panel details that could be seen as ground-breaking, but in fact the real innovation was in new major accuracy errors no other kit had previously considered... A true retrograde kit in almost every way...
It really is a lot less accurate than even the old flawed Tamiya kit which, with its big cowling "step", and its far too upright windshield (also 1mm too wide and 2mm+ too short), is surprisingly difficult to correct... The Dragon 190A was probably the best of the old 190As, but I never liked it because, despite good overall dimensions, its overall cowling diameter/lenght was visibly undersized, being about 1/50-1/52 scale.
The Tamiya cowling is about 2mm short in chord, and the armoured cowl ring needs terribly to be blended in with it, but surprisingly, this Tamiya armoured cowl ring fits better to the Hasegawa cowl than the Hasegawa's own cowl ring(!), and is a major improvement in fit and appearance, with a correct nearly flush stepped join appearance... Even the location tab works perfectly...
Similarly, the narrow style Tamiya prop is an essential substitute for any Hasegawa 190A version so equipped. I have not seen the Hasegawa broad blade prop interpretation yet, but Hasegawa props are often poor...
Overlaying one-eyed to several photos, Hasegawa's 1/48th A-5/6/8 series is the first ever "Anton" serie with an entirely correct overall cowl diameter and lenght. Meanwhile, the Eduard cowl innovates with a never before seen extra-broad laterally and razor-thin-lipped cowl ring, and, worse still, a complete lack of the upper cowl half "taper", something NO previous modern 190 kit had ever missed... The Eduard 190A cowl is essentially a tube with paralell sides all around, and this it definitely should not be...
With the cowl absent and the clear parts modified, replaced or partly gone, the Eduard's usefulness improves, especially if you must have the wingroot gun bays open. Much as I don't like this kit, I would actually choose it for specialized diorama purposes, such as crashed displays, heavy maintenace etc...
Given the wide availability of the Hasegawa A-5/6/8 series, choosing the Eduard for a ready-to-fly display is simply incredible to me. Even more incredible is the Eduard's media dominance. I hope I don't sound too unpleasant saying this...
Gaston.
P.S. As I said above, be wary on the Hasegawa 1/48th A-5/6/8 kit series of a tendency of the cowl to sit nose-up, as it caused me a LOT of assembly problems, since no build reviews existed to make me aware of this.... Despite the small contact points, do not use cyano glue until you are sure of the cowl's pitch angle by seriously trimming all the complicated semi-circle contact points at the bottom...
If you know of one with an old sticker price in your LHS, buy it now as, like all of Hasegawa and much of Trumpeteer, it is in the process of nearly doubling in price! (At least in North America)
G.