Having seen the Merrell Trail Glove and the Minimus side by side I can say that both of these options are almost apples to apples, with the biggest difference being the 4mm drop vs. the 0mm heel/toe drop on the Trail Glove- 'barefoot' purists would likely claim is a huge difference. Both the Trail Glove and the Minimus are insanely pliable and the amount of proprioception underfoot in the Minimus is amazing, you feel enough underfoot for your body to adjust but there's just enough protection in the Vibram outsole and rubber toe rand that you can sprint on rocky trail without agonizing over every foot strike. I'm currently running in the Minimus Trail having been lucky enough to get my hands on a pair 2 weeks ago, so far I have about 35 miles alternated between my other running shoe the NB MT101- I'm extremely pleased with the Minimus so far which I had my reserves about. The width of the Minimus is fairly wide, slightly wider than my MT101's which provided ample room for my 'widish' flat feet.
As far as the transitional aspect of the Minimus having 4 mm, I'm not a zero drop or VFF runner, I prefer footwear that doesn't inhibit my style, location, or pace of running- I'm not willing to take months to adapt my body to being able to run rocky technical trails in VFF and suffer a performance loss (slower pace) in doing so- I've yet to meet a VFF runner that can 'attack' trail, they're always tip toeing around stuff slowly which is fine, but to me isn't exactly my type of 'running'. There's no doubt that the Trail Gloves and the Minimus are a dedicated trail running shoe, not a lifestyle or wellness shoe which I think the VFF tends to lean towards. Right out of the box the Minimus Trail suited my running and didn't inhibit what I like to do, they felt broken in immediately, and I had little adaptation time other than 3 days of slightly tender calf and achilles tendon. With that said, the Merrell Trail Glove and the Minimus alike I think will allow more people the ability to regularly wear flat shoes and improve their form whether that is walking or running.
9 miles of this rocky trail right out of the box last weekend in the Minimus, my running buddy wore the Merrell Trail Glove.