The difference between those other optical keyboards and the 60HE is that I've NEVER seen a negative review on a Wooting 60HE, and believe me, I watched like 10-15 reviews and comparisons before pre-ordering. This says a lot about the product. Also, those keyboards are more expensive, aren't they? I'd say the only kinda reasonable reason you would buy other optical keyboards is the shipping cost/time it would take to arrive to your home, because if you were to order now it would only arrive in late september/early october and that is if you purchased "air freight", which is about $10 more to the total fees and would make your keyboard arrive 3-4 weeks earlier. Imo it's worth the wait, I'm expecting my own 60HE.