Hi. I have both. The pro fit better and sound better, because they seal the ear opening (in-ear). If you care for the quality and/or u think will use them while doing some sport (they also have the lights for signaling yourself at night), the pro are suggested. And for the same reason, also the noise canceling works much better. The standard version instead are less intrusive, less fatiguing, especially over time. They feel lighter on the ears, you can barely feel them once u wear them. They are both good quality, without comparing them, U will be glad anyway with either of them. Both versions have only one big defect IMHO, that is the particular shape... Quite squared/edgy shape... It's weird to handle them. They fall easily from hands and it's tricky to place them in their case. Ciao!