When I first saw the knuckles/index controllers being demoed, I was wowed by them and couldn't wait to get my hands on them. Now that I have them, I think I prefer Touch and I'll explain why...
1. Notice how the index is dimpled. You have a much better tactile feel and grip for your thumb. Both XBox One and PS4 controllers have this. Why mess with perfection?
2. With Touch your last two fingers, pinky and ring finger, both grip the end of the controller as you move the thumbstick giving you better leverage and control. For the Index, griping is grabbing so can't grab.The buttons
1. Notice how the Touch has four distinctly labeled buttons A, B, Y, X just like the XBox controller or PS4 controller using symbols. Index has A, B for both. They can be mapped differently but in games, you can't get a convenient Y or X indicator for what button you need to press. Grabbing
1. On Touch, grab is a trigger type button with travel. You clearly feel it and know how much travel you're applying. The Index depends on pressure. If you squeeze it hard enough you'll feel some click like feedback. This creates ambiguity when holding something. If the pressure your applying drops below some threshold, you drop what you're holding. I find that I grab things I didn't intend to grab and drop things that I didn't intend to drop.
Tracking your ring and index finger serves very little practical use in games. Game makers aren't going to want to use a feature that's exclusive to the Index. And it's hard to imagine what you would really do with those fingers in a game that would be meaningful. Strap
1. You have the extra hassle of slipping your hands into the traps and out of the straps. It's not a huge hassle but it feels like taking gloves off one at a time versus just putting the controller down.
2. Because your hands are strapped in, you can't slide your thumb up and down as easily as you can with touch. Charging
When I finish playing with my Index I have to remember to plug the controllers in to charge. With Touch I use rechargeable batteries and I can always just swap out batteries when they get low. It takes about 3 hours to charge the Index controllers. But that's a matter of preference. Some people prefer the ps4 controllers vs xbox battery swap. Price
1. We all smash our controller onto the wall or a desk once in a while. So, it's better if they're cheaper to replace if you break them.
The bottom line is while they look better and have this cool looking finger tracking feature, they're not functionally better yet cost much more. And for some crazy reason, they abandoned controller conventions that have been around for decades.
I'm not even going to discuss how bad the trackpad/d-pad thingy is because Touch doesn't have one so overall it's an advantage for the index. You can press it like a button and use it like the d-pad in the xbox and ps4 controllers.
It may seem like I'm trashing the Index controllers but I'm not. They're a huge improvement over wands and finger tracking is cool.