I have never ran a spartan, but currently deploy dozens of cells cams. Reconyx, cuddelink, moultrie, and the reveals. Have a few Exodus to try this year for the first time. This is a slippery rabbit hole and no matter what you claim, there is going to be another guy that comes out of his seat against it. There are pro's and con's to them all, but from my experience with the list above:
Cuddelink (K, J, G & now L) - Cell plan is great. I use them for larger network, owned property because of that, but they no doubt miss things and are incredibly sensitive to angle/position. Do not do well at all on a field edge for some reason unless a deer is right in front of it. I fell in love when they first came out, but other brands have passed them by since inception. They also use a ton of battery and after all of the external power items needed, it quickly washes most of the cell plan savings. Have had many die off just after the 2 year warranty it seems. They do take great pics and the customer service is great though.
Reconyx - In a different league but who can afford to cover a property with them at 600$/ea. It also costs me $10/cam per month to run.
Moutrie - Save your money. Got rid of them all due to lack of reliability.
Tactacam - Very, Very skeptical when they came out. Did not buy the Gen 1 because of it. How could a $100 cell cam be worth a nickel?
Now I have around 30 and not one single small issue yet. 15 have been out 3 seasons running flawlessly. Use the rec'd U3 SD and reputable (Duracell, rayovac) AA's and dont put them on a feeder and you will be pleased. They run July-Feb on Alkalines for me, but I am putting them on trails, scrapes, edges so maybe a couple dozen pics/day. Put Lithium's in a few far away ones and they will run 1 year+. It's $5/mo and the pics pool together, so when I have them out in full force its never a problem staying out of data overage. I also don't have a ton of deer so again, pics arent crazy high. They are VERY sensitive and way more reliable than any cell cuddeback and definitely moultrie. Probably the same as reconyx detection wise. If you are hanging them at proper height/angle, I have total confidence that anything walking by will get a pic taken. Have seen it over and over. I hunt a lot of little one and two cam thickets and hedgerows, so they are perfect for that application for me. Will they die in 5, 6+ years, maybe?? Time will tell but at $119/ea (sometimes 7-80$ on Wally World rollback), how can you beat it?!
Exodus - Will deploy in July but haven't heard a bad word about them ever. 5 year warranty tells me it must be greatly quality. We will see!