I would, If your on low carb diet you gonna need to get your calories somewhere.
Remember, low carb or ketogenic is NOT a low cal diet if you want to make any-type of gains.
I recommend red meat, its an excellent source of nutrition, the fat in it is SATURATED the same as coconut oil only with all kind of nutrients.
So , yes I would recommend ground red meat 80/20.
if you cook your higher fat ground beef by making burger patties then grill or fry them.....then put several layers of paper towels under the burgers and squeeze the extra fat out of them....they will be as lean as the 96% beef is....or pretty close anyway.
In the end, if you cook and hot rinse the final product the fat content ends up pretty much the same.
You'll notice when you cook the 95% lean that there is much less fat to pour off before you rinse.
It would be interesting to start with exactly a pound of each, cook, rinse and weight-again after preparation.
If you're buying high-quality grass-fed beef, you're paying for better quality fat. why pour it away....?
The only thing I don't like about the hamburger with more fat is how much it wants to start a fire on the grill. The fat dripping down causes so many flames that the burger burns easily. I do think though that when you grill it, much of the fat ends up dripping down so that you don't consume it anyhow.
I only buy good quality mince. I would rather add in fats from other sources than bad cheap stuff. Although that doesn't mean I buy low fat as the ones I have been buying recently are 12% fat and organic and cost me about $11 for approx 400g. That has done me for my 2 beef meals daily the last few days but I will also swop over to steak some days.
I usually go with 93/7 for ground red meat. Not sure about prices where you are located but you might want to try going with a cheap lean cut of steak. Steak tends to be on the cheaper end, a little on the tough side but won't break the bank.
When I was younger I hunted and ate elk and moose. These days when I splurge I buy bison. Game meat is lower in cholesterol and higher in quality protein.
I buy 85% beef, organic, at the market otherwise. I buy everything I can organic. I used to have the meat processor that processed my game meats add 15% beef fat to the game meat burger because it cooks better on the grill and is a lot juicer than 90+% lean burgers that I've eaten.
Me - I vote for 85% not matter what the quality you can afford to purchase.