Comparing these two units. Land Pride SA10 and Premier MD09 Feedback welcomed. I have a Deere 3320 with 300x loader. I will need third function hydraulics. Every thing I see shows 14gpm flow from my machine.


Land Pride
https://www.landpride.com/products/8868/sa10-hydraulic-post-hole-digger



Tractor Earth Auger Drives | Premier Attachments
https://www.premierattach.com/products/earth-auger-drive-units/tractor-earth-auger-drives
When you need medium-duty or heavy-duty augers that can be used with tractors, you can count on getting the best of either (& the most affordable) from Premier.

Check out Danuser. No idea on the price difference to those you posted.

SGrem. I have used front mount tractor augers. Both on tractors and Skid Steers.
If you are going to be in rocky hard ground like the hill country you need lots of down pressure and that's where the issue comes in. Medium size tractors and Skid Steers don't have enough weight for that down pressure.., you will just lift the tires off the ground.
Now if you are in normal, decent soils they work fine.
The challenge is continuing to drill the hole straight and not letting the head/auger pivot.
You will need to match your bit to the type of soils/rocks you will be in…. Which depends on the number of teeth on the drill auger. Also need to decide on the best diameter for your use.
I can't tell you how many holes I have drilled building high fence and low fence. I would tell you that the best I have used are made by Beltec in Belton Texas. They were like the inventors of those heads and were the standard that others copied.
If you are going to be drilling in very hard solid rock or limestone, flint…. Beltec makes a three point hydraulic down pressure drilling machine. It's like a small true drilling rig that provides down pressure amounts that you can not get close to on a front mounted auger. I have one and it's the common machine fence builders use in the hill country.
If you don't need that capability I still highly recommend Beltecs front mount augers. They are great people and have great service and built in Texas.
Danusser is the next best front auger head in my opinion. Very high quality and been in business a long time.
Either one will make you a long lasting commercial type auger.
I don't know anything about the brands you listed as I don't see either of those used in the HC
In the Ozarks all the fence buiders use Danusser augers or Danusser hydraulic drivers. They can drive 6" pipe 5-6 foot if they need to.
Hope some of this might help you.
I have owned two Beltec Three point down pressure drilling machines and one front mount auger. They have given me little trouble with lots of holes drilled.
Good luck on your search.