I have both the Showers Pass Elite 2.1 and The Pro 2.1. The elite has more venting and is a little looser. If you go for the Pro(I love the Goldenrod color), do not go up in size as tempted as you might be. If you want a looser fit, just get the Elite. The Pro is packable and lighter. I went up and it gets floppy in the wind, a little. After riding with it, I prefer my jackets to fit like a jersey and the pro in the right size will be that. The Elite is great too. I happen to stumble on a great sale and just had to have the Pro after already owning the Elite. Went with the Red Elite. Looks great. Both jackets we you get up to speed, you can feel the air going though them while riding, at least that is the impression I get. I do not wear them for warmth as they are just shells. Layering or other softshell jackets get used for that purpose.
Love them both.