I've been researching this for a while as a cost saving going lithium and here's what I found. It looks like they'd outperform regular lithium batteries in a bass boat if I understood everything right in this article.
https://lithiumhub.com/lifepo4-batt...msclkid=b93db3b0a7db11ecbb2d4be3428edc48

Regular lithium batteries explode when subjected to water, you will only find lifepo4 for marine environments.

Which LiFePO4 are you talking about on Amazon? https://www.renogy.com/12v-100ah-li...y6ZRHV7XqV9-yPsLznSInIo0V1xoCc8cQAvD_BwE

You get what you pay for. There is a guy on youtube that disassembles all the lithium batteries. He breaks them down to find out how they are made, and check out the BMS & low temp cutoff. When the batteries are disected the temp sensor is not what they say. Many, many batteries say they have a low temp cutoff, but this is false. Suprisingly many are made by the same company and packaged differently. Do some digging, and then see what you can find. Only thing that I am concerned about is the warranty. I picked up a couple of 100ah eg4 batteries from signature solar, and will be adding another two batteries mid year. Going from two of the group 29 maxx flooded deep cycle batteries which were about 70 lbs each, to two 22lb batteries is very suprising. I will probably get the ionic mid year and move those to the trolling motor, but I am torturing these until then. I watched many of videos and posts about lithium, but even I was suprised. I ran the snot out of them for 8 hours, then when i trailered I checked them with the bluetooth app and they were at 87%. It really was surprising, and I run electric RC cars with my son so I should have known. I know pound for pound there is nothing that competes with lithium but it's still a little surprising. Time will tell, if you can find some with a decent warranty, and the company has been around for a long time maybe you could save a few dollars. There is no real way to tell if you are buying grade A, B, or C lithium batteries unless you buy from someone reputable. My fishing mentor had a problem with one of his ionic batteries, it got too low. Ionic gave him the support he needed to recover the battery. I think he also had one replaced with no questions or problems. I also like the way he can pull up all his batteries on his phone and check them all at the same time. I believe their app will also warn you if you get too low, or will do something special if you need reserve for emergency. But this is just something I remember hearing, someone with their product can chime in.

If it were me, and the neck of the household approved the purchase I would go ionic. You won't be buying batteries for 10+ years. Im the head of the house, but my wife is the neck of the house and the neck turns the head. If you have to stay low on the radar you might try the lower cost batteries available on amazon. There are people out there that have tested them, and can give real world results. But some companies change names, or are hard to get any type of suport from.

Good luck, and keep us posted on what you go with.

With these fuel prices we are all going to have to look at ways to lighten the load on the boat and our tow vehicles. Sitting here reading this I could see not only lithium batteries helping by boat fuel milage but my pickup as well; getting rid of towable weight.
On a side note: I checked the air pressure on my tires on my trailer and they were low by about 5 pounds, one really low about 25 pounds. I aired them all to 40 pounds so we'll see how that effects my towing milage. It should help noticeably based on previous experience.

With these fuel prices we are all going to have to look at ways to lighten the load on the boat and our tow vehicles. Sitting here reading this I could see not only lithium batteries helping by boat fuel milage but my pickup as well; getting rid of towable weight.
On a side note: I checked the air pressure on my tires on my trailer and they were low by about 5 pounds, one really low about 25 pounds. I aired them all to 40 pounds so we'll see how that effects my towing milage. It should help noticeably based on previous experience.

I only have experience with the Ionics, but I could not be happier with them. I bought the 3- 50ah /125ah package for my boat. I run a ghost trolling motor in 36 volt setup. I took 3 day trip to Toledo Bend and fished 3.5-4 days without having to recharge the batteries. The cranking battery was at 50% and the trolling batteries were at 54% at the end of the trip. When I was buying them I was skeptical to spend that kind of money for 50 ah batteries, but when you think about it a good agm battery will cost you about the same as the ionics. Wasn't sure the 50 ah would be enough capacity, but on several peoples advice I bought them. I am not a tournament fisherman, but as weekend angler with moderate to heavy use these batteries work well. The cranking battery starts a Yamaha 250 SHO, runs livewells, 2 -12 inch graphs, and all other accessories.