I love the Asics Gel-Nimbus and have only worn this one for years. I bought this pair of Asics Gel-Nimbus 23 Knit running shoes in addition to a pair of Gel-Nimbus 23 Platinum running shoes. I liked the grey/black colors of these shoes for a bit of variety, but wasn't sure what the other differences were as they were both Asics Gel-Nimbus 23. Wow. I was shocked! These Asics Gel-Nimbus 23 Knit running shoes are lighter and have an even more cushioned feel (especially in the heel area). I usually only buy the Platinum versions each year, but I may have found a new favorite. They are even more comfortable than the Gel-Nimbus 23 Platinum I just received.