I find it perplexing that many people are already so certain that Montgomery is a superior running back to Howard. Forget the college scouting reports, Jordan Howard has already proven himself in the actual NFL. Two of his three seasons, Howard was a top 5 and top 10 back in the league. Once upon a time, Todd Gurley had an even worse season than Howard did last year due to his failed run blocking and scheme fit. Calling Montgomery the better player is kinda crazy at this point in time.
Jordan Howard is a decent running back, but his production has slipped every year in the league. Yes, in terms of yards he was top 5 and then top 10 in rushing. But seeing how everyone wants to talk about yards/attempt, Howard went from #4 (5.2 ypc) in 2016 to #20 (4.1 ypc) in 2017 to #39 (3.7 ypc) in 2018.
I get that it is early to declare Montgomery a superior runningback as the guy has not played a single NFL game. But, at an early glance, he appears to have the traits to be a better scheme fit for Nagy's offense. With the runningback by committee approach that I expect from Nagy this season, I am not expecting Montgomery to have ridiculous total yard numbers, but I would expect him to have better production in terms of yards per attempt, and better receiving numbers than Howard had in 2018 and hopefully better than what Howard did in 2017 too.
As far as the Khareem Hunt comparison goes, looking at 2017's pure rushing numbers, he had 1327 yards (#1) on 4.9 ypc (#4). In 2018, Hunt was getting 4.6 ypc through 11 games.
Now, looking at the receiving element, Hunt also had 455 receiving yards on 53 reception (8.6 ypr) in 2017. In 2018, in just 11 games, Hunt had 378 receiving yards on 26 receptions (14.5 ypr).
In 2017, Howard had 125 yards on 23 receptions (5.4 ypr). In 2018, Howard had 145 yards on 20 receptions (7.3 ypr). Interestingly, Howard had 298 yards on 29 receptions in 2016 (10.3 ypr) but his catch % was only 58%. In 2017 and 2018, Howard's catch % went up into the 70's but for less ypr.
Now, in trying to look beyond the numbers, I think the other main point that has been mentioned before is that the offense was too predictable just based on personnel groupings last year. Essentially, if Howard was in the game, the chances were a lot higher that the play would be a run than a pass except in obvious passing downs/situations. So, the thought process is that Montgomery and Davis for that matter bring that element of receiving threat that Howard has not really had the past couple of years to make the offense less predictable and consequently more productive as a whole.