X-wing Enduro is known for chewing through shocks, killed two STX’s on mine and a mate killed multiple inlines and I know of a few monarchs that were killed off as well. You can’t really use the old enduro as a yardstick and the inline has been improved a lot since 2015.
Latest Inlines are very good, in our riding group we’ve all had one recently with no issues at all, I put 1500miles on mine, mate has one on his fuel and must be similar. All the changes they’ve made have removed all the niggling problems they had.
You don’t see many TTX airs about and I dont know anyone that has had one, so its a little bit of an unknown.
I had an Inline on my Stumpy Evo and it worked really well, shame the bike was too small for me. Its worth looking at the cascade links to fix some of the linearity and wallowing they are known for, I wouldn’t be putting a coil on it.