The great thing about Stardew Valley that sets it apart from Harvest Moon is the fact that it is customizable with mods. The possibilities are only limited by your imagination.
So one could, depending on their coding abilities, develop a mod to recreate aspects of Harvest Moon.
On while we are on the subject of mods, you may want to check out Animal Social Menu mod:
A social menu for your animals.
www.nexusmods.com
Dude I had logged so many hours into harvest moon. I can tell you this game is so superior. In HM you could only hold one item at a time, had to ship all items before 5pm, no cooking, limited fishing, no walking over crops, limited livestock, horrendous animal selling mechanic, limited crops,hurricanes, season based tool upgrades, and no befriending NPCs. And the worse thing of all. No matter how many of each crop, how well each animal was treated, how much of the farm you utilized, how many secrets you found, have the kids, fully upgrade everything. Then after 2 1/2 years your dad comes in to gripe at you while your mom is bawling and your game ends with you being pecked to death by chickens for dropping an egg.
The only things that HM had over stardew valley is.
Time stops after 9pm. This allowed you to visit the hotsprings and heal and clear your farm of all level one debris over night and maintain huge fields as you just harvest in the mornings and watered at night. Which when exploited allowed the marriage of a character and corresponding upgrades by spring 14 year 1
Time stops in buildings. Yeah you could take care and brush all your animals. However the game encouraged you to send them outside to graze as it built friendship up faster and allowed easier feeding.
Grass was permanent. When you planted grass that plot was taken up nearly permanently only being removed by placed items or the typhoon/hurricane ripping it up or placing items on t.
Secret garden. It was a visual indicator of how many power berries(stardrops) you found.
The last is the bell. A simple tool that when rang called the livestock to you. Would be so helpful since chickens are shorter than grass in stardew
Honestly after posting all those changes I cannot see how anyone can say stardew is the lesser game. Heck if you wanna see messy games see the new stories of seasons or the rune factory styles that Natsune had released or authorized to be made. I mean they each have their selling points but stardew is in that Goldilocks zone that is not to gimmicky(Harvest Moon:One World) or not too industrial (farming simulator 19). This allows the game to be as openly accessable to the most possible groups with it's only short coming to some is not allowing for they/them instead of him/her.
So while this is divergent it's only marginally as the TC and other users are comparing SV to HM.