I purchased the previous 40L model a few years ago. The only real difference is the front pocket - mine is horizontal, not vertical, when the backpack is being worn. No big deal.
I love the size - I used it for a 6-day trip to Santa Rosa, CA in October 2023 and a 2-week trip to Europe in December 2023 (Prague, Berlin, Budapest, Vienna, Frankfurt) and didn't use another piece of luggage on either trip (although I wore a 26-pocket ScottE Vest in Europe.) I also use it for business travel (usually 3 days or less) and carry a large company-issued laptop.
My main complaint: weight management is (almost) completely absent. The backpack needs D-rings in the two top corners of the main compartment so that heavier objects can be restrained high and close to the wearer's back; this is a crucial element in backpacking. The ability to add aluminum stays would also be very welcome to improve fit when the backpack is heavy. (Mine weighed close to 40 lbs(!) on my European trip.)