The situations where an Inna's belt beats out a WH are slim, and generally has to do with gearing choice. Additionally going with an Inna's belt puts greater strain potentially on other pieces to find the correct stats for balancing purposes.
I'd be interested in seeing what you normally use gear wise, rather than what looks like your farming gear in profile currently?
As a point of comparison, that would imply that WH has survivability to boast that Inna's doesn't, if it's not winning out in damage. And I'm pretty sure we all know WH is notorious for being really light on anything but damage.
I had the feeling maybe I was comparing mediocre WH's to my belt, so I went and looked at the best dex WH's on the AH. The really pricy ones are 4K-5K upgrades, so they're technically a DPS upgrade for 200M-1B. So you're right technically--that just doesn't seem like a huge amount to me.
I recently made this switch.
Even with black weapons, the WH represented a 2-3k dps upgrade, but it also represented a 40-50k EH upgrade.
The thing that is nice about WH is that you can get Vit in addition to resist, so that's a nice jump of EH right there. It also allows you to expand your weapon search from only black to all types.
Vit might be a good call if you are trying to gear out multiple characters.
But it doesn't make sense to craft a Vit chest since that is the one place that Vit can roll up to 200.
I also don't think it makes sense to roll Vit gloves, because the only way you are coming out ahead in terms of Dex+Vit stats is if you sacrifice a damage affix.
So, for example:
-200-230 dex guaranteed
1. 100 dex + 100 vit
2. 80 AR
Total: 300 dex, 100 vit etc.
-200-230 vit guaranteed
1. 200 dex
2. 80 AR
Total: 200 dex, 200 vit, etc.
In both cases you are getting 400 total stats. Only if you replace #5 with a singular dex or vit roll does this change the equation and give the vit gloves an extra 100 stats overall.