I think due to the semi-open design Hi2050 have SHR940 beaten in soundstage width .At the moment I can hear samples about 1" either side of my ears using Aune T1 and Golden lion tube. The Shure aren't that impressive in the way of space and you really need to try and extract much air as you can from your source, DAC, amp etc.
SHR940 have more dynamic impact though sounding brighter aggressive. Where the Hi2050 reach their top level of detail and constantly hover around that region SHR940 will have a higher ceiling which shows when the recording asked it too or depending on your volume level. So for example, if I lift the volume on Hi2050 it will cap out in detail, (but at a more than enjoyable level), Wheras the 940 will open up like a racing car and rev harder .Despite the poor build SHR940 are one of the most detailed headphones I've heard.
Compared to SHR440 the Hi2050 sound warm, smooth, boosted in bass and a little coloured.. 440 in comparison sound analytical and SHR940 share many of those traits.
Hi2050 sound more akin to a DT880 IMHO from any headphone I've heard. but with slightly more bass.