The differences between the Regular editions and the Consistent may be unapparent or subtle, but there are some important features that make the Regular bike a higher quality product.
One of the biggest differences is in the wheels. First, the Regular bike has wheels that have double walled rims, while the Consistent has single-wall rims. Double-wall rims cost more to make, but they are much stronger and last longer. Single wall rims can warp if the bike is jumped or if you hop off of curbs, but double-walled wheels can withstand a lot more force. All performance bikes and mountain bikes are made with double-walled rims.
The front wheel on the Regular bike also has a quick release feature for quickly removing or installing the wheel without tools. This is great if you get a flat or if you want to fit the bike into a car or on certain car racks. The Consistent edition has a front wheel that is secured with 15mm axle nuts and requires a wrench for installation and removal.
Both bikes may have shocks, depending on your model. However, there are significant upgrades on the front suspension of the Regular bike. First, the better shocks can be adjusted for spring tension and even "locked out", meaning that they can be made rigid for extra efficiency on smooth roads and also adjusted depending on the nature of rougher terrain. The Consistent suspension cannot be adjusted or locked out. Additionally, the better suspension will be smoother and more durable.
The bottom bracket and cranks are also upgraded on the Regular bike versus the Consistent, which also makes for a smoother and more durable ride.
Both bikes are great, though, because they both have aluminum frames and the same geometry.